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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Successful build of swift-collections with Swift 6.0 for Linux.

Swift 6 data race errors: 4

Build Command

bash -c docker run --rm -v "checkouts-4609320-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/GoodHatsLLC/swift-collections-v1_1-fork.git
Reference: main
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/GoodHatsLLC/swift-collections-v1_1-fork
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at d800378 Merge pull request #291 from lorentey/rope-fix-find-at-end
Cloned https://github.com/GoodHatsLLC/swift-collections-v1_1-fork.git
Revision (git rev-parse @):
d8003787efafa82f9805594bc51100be29ac6903
SPI manifest file found: $workDir/.spi.yml
SUCCESS checkout https://github.com/GoodHatsLLC/swift-collections-v1_1-fork.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $workDir
https://github.com/GoodHatsLLC/swift-collections-v1_1-fork.git
Running build ...
bash -c docker run --rm -v "checkouts-4609320-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1
Building for debugging...
[0/10] Write sources
[9/10] Write swift-version-24593BA9C3E375BF.txt
[11/27] Emitting module _CollectionsUtilities
[12/29] Compiling _CollectionsUtilities Descriptions.swift
[13/29] Compiling _CollectionsUtilities RandomAccessCollection+Offsets.swift
[14/29] Compiling _CollectionsUtilities Array+WithContiguousStorage Compatibility.swift
[15/29] Compiling _CollectionsUtilities UnsafeMutableBufferPointer+SE-0370.swift
[16/29] Compiling _CollectionsUtilities UnsafeMutablePointer+SE-0370.swift
[17/29] Compiling _CollectionsUtilities UnsafeBufferPointer+Extras.swift
[18/29] Compiling _CollectionsUtilities UnsafeMutableBufferPointer+Extras.swift
[19/29] Compiling _CollectionsUtilities _UnsafeBitSet+Index.swift
[20/29] Compiling _CollectionsUtilities _UnsafeBitSet+_Word.swift
[21/29] Compiling _CollectionsUtilities UnsafeRawPointer extensions.swift
[22/29] Compiling _CollectionsUtilities FixedWidthInteger+roundUpToPowerOfTwo.swift
[23/29] Compiling _CollectionsUtilities Integer rank.swift
[24/29] Compiling _CollectionsUtilities _UniqueCollection.swift
[25/29] Compiling _CollectionsUtilities Debugging.swift
[26/29] Compiling _CollectionsUtilities UInt+first and last set bit.swift
[27/29] Compiling _CollectionsUtilities UInt+reversed.swift
[28/29] Compiling _CollectionsUtilities _UnsafeBitSet.swift
[29/29] Compiling _CollectionsUtilities _SortedCollection.swift
[31/339] Compiling HeapModule Heap+Descriptions.swift
[32/339] Compiling HashTreeCollections _HashNode+Structural union.swift
/host/spi-builder-workspace/Sources/DequeModule/_DequeBuffer.swift:44:14: warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
42 | /// The type-punned empty singleton storage instance.
43 | @usableFromInline
44 | internal let _emptyDequeStorage = _DequeBuffer<Void>.create(
   |              |- warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: annotate '_emptyDequeStorage' with '@MainActor' if property should only be accessed from the main actor
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |   minimumCapacity: 0,
46 |   makingHeaderWith: { _ in
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[33/339] Compiling HashTreeCollections _HashNode+Subtree Insertions.swift
/host/spi-builder-workspace/Sources/DequeModule/_DequeBuffer.swift:44:14: warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
42 | /// The type-punned empty singleton storage instance.
43 | @usableFromInline
44 | internal let _emptyDequeStorage = _DequeBuffer<Void>.create(
   |              |- warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: annotate '_emptyDequeStorage' with '@MainActor' if property should only be accessed from the main actor
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |   minimumCapacity: 0,
46 |   makingHeaderWith: { _ in
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[34/341] Compiling HeapModule Heap.swift
[35/341] Compiling HeapModule Heap+ExpressibleByArrayLiteral.swift
[36/341] Compiling HeapModule Heap+Invariants.swift
[37/341] Compiling HeapModule _HeapNode.swift
[38/341] Compiling HeapModule Heap+UnsafeHandle.swift
[39/341] Emitting module HeapModule
[41/342] Compiling _RopeModule BigString+UTF16View.swift
[42/342] Compiling _RopeModule BigString+UTF8View.swift
[43/342] Compiling _RopeModule BigString+Comparable.swift
[44/342] Compiling _RopeModule BigString+CustomDebugStringConvertible.swift
[45/342] Compiling _RopeModule BigString+CustomStringConvertible.swift
[46/342] Compiling _RopeModule BigString+Equatable.swift
[47/342] Compiling _RopeModule BigString+ExpressibleByStringLiteral.swift
[48/342] Compiling _RopeModule BigString+Hashing.swift
[49/342] Compiling _RopeModule BigString+LosslessStringConvertible.swift
[50/342] Compiling _RopeModule BigString+RangeReplaceableCollection.swift
[51/352] Compiling _RopeModule BigString+Append.swift
[52/352] Compiling _RopeModule BigString+Initializers.swift
[53/352] Compiling _RopeModule BigString+Insert.swift
[54/352] Compiling _RopeModule BigString+Managing Breaks.swift
[55/352] Compiling _RopeModule BigString+RemoveSubrange.swift
[56/352] Compiling _RopeModule BigString+ReplaceSubrange.swift
[57/352] Compiling _RopeModule BigString+Split.swift
[58/359] Compiling HashTreeCollections TreeDictionary+Descriptions.swift
[59/359] Compiling HashTreeCollections _AncestorHashSlots.swift
[60/359] Compiling HashTreeCollections _Bitmap.swift
[61/359] Compiling HashTreeCollections _Bucket.swift
[62/359] Compiling _RopeModule Rope+ForEachWhile.swift
[63/359] Compiling _RopeModule Rope+Insert.swift
[64/359] Compiling _RopeModule Rope+_Storage.swift
[66/359] Compiling _RopeModule Rope+_UnmanagedLeaf.swift
[67/359] Compiling _RopeModule Rope+_UnsafeHandle.swift
[68/359] Compiling _RopeModule Rope.swift
[69/359] Compiling _RopeModule RopeElement.swift
[70/359] Compiling _RopeModule RopeMetric.swift
[71/359] Compiling _RopeModule RopeSummary.swift
[72/359] Compiling DequeModule _DequeSlot.swift
[73/359] Compiling DequeModule _UnsafeWrappedBuffer.swift
[74/366] Compiling HashTreeCollections TreeDictionary+Equatable.swift
[75/366] Compiling HashTreeCollections TreeDictionary+ExpressibleByDictionaryLiteral.swift
[76/366] Compiling HashTreeCollections TreeDictionary+Sequence.swift
/host/spi-builder-workspace/Sources/DequeModule/_DequeBuffer.swift:44:14: warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
42 | /// The type-punned empty singleton storage instance.
43 | @usableFromInline
44 | internal let _emptyDequeStorage = _DequeBuffer<Void>.create(
   |              |- warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: annotate '_emptyDequeStorage' with '@MainActor' if property should only be accessed from the main actor
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |   minimumCapacity: 0,
46 |   makingHeaderWith: { _ in
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[77/366] Compiling HashTreeCollections TreeDictionary+Values.swift
/host/spi-builder-workspace/Sources/DequeModule/_DequeBuffer.swift:44:14: warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
42 | /// The type-punned empty singleton storage instance.
43 | @usableFromInline
44 | internal let _emptyDequeStorage = _DequeBuffer<Void>.create(
   |              |- warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: annotate '_emptyDequeStorage' with '@MainActor' if property should only be accessed from the main actor
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |   minimumCapacity: 0,
46 |   makingHeaderWith: { _ in
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[78/366] Compiling HashTreeCollections TreeDictionary+Filter.swift
[79/366] Compiling HashTreeCollections TreeDictionary+Hashable.swift
[80/366] Compiling HashTreeCollections TreeDictionary+Initializers.swift
[81/366] Compiling HashTreeCollections TreeDictionary+Keys.swift
[82/366] Compiling HashTreeCollections TreeDictionary+MapValues.swift
[83/366] Compiling HashTreeCollections _HashNode+Structural subtracting.swift
[84/366] Compiling HashTreeCollections _HashNode+Structural symmetricDifference.swift
[85/366] Compiling HashTreeCollections TreeDictionary+Merge.swift
[86/366] Compiling HashTreeCollections TreeDictionary+Sendable.swift
[87/366] Compiling _RopeModule BigString+Sequence.swift
[88/366] Compiling _RopeModule BigString+TextOutputStream.swift
[89/366] Compiling HashTreeCollections TreeSet+Collection.swift
[90/366] Compiling HashTreeCollections TreeSet+CustomReflectable.swift
[91/366] Compiling HashTreeCollections TreeSet+Debugging.swift
[92/366] Compiling HashTreeCollections TreeSet+Descriptions.swift
[93/366] Compiling HashTreeCollections TreeSet+Equatable.swift
[94/366] Compiling HashTreeCollections TreeSet+ExpressibleByArrayLiteral.swift
[95/366] Compiling HashTreeCollections TreeSet+Extras.swift
[96/366] Compiling HashTreeCollections TreeSet+Filter.swift
[98/366] Compiling HashTreeCollections _HashNode+UnsafeHandle.swift
[99/366] Compiling HashTreeCollections _HashNode.swift
[100/366] Compiling HashTreeCollections _HashSlot.swift
[101/366] Compiling HashTreeCollections _HashStack.swift
[102/366] Compiling HashTreeCollections _HashTreeIterator.swift
[103/366] Compiling HashTreeCollections _HashTreeStatistics.swift
[104/366] Compiling HashTreeCollections _RawHashNode+UnsafeHandle.swift
[111/366] Compiling _RopeModule _RopeItem.swift
[112/366] Compiling _RopeModule _RopePath.swift
[113/366] Compiling HashTreeCollections _RawHashNode.swift
[114/366] Compiling HashTreeCollections _StorageHeader.swift
[115/366] Compiling HashTreeCollections _UnmanagedHashNode.swift
[116/366] Compiling HashTreeCollections _UnsafePath.swift
[117/366] Compiling HashTreeCollections TreeDictionary+Codable.swift
[118/366] Compiling HashTreeCollections TreeDictionary+Collection.swift
[119/366] Compiling HashTreeCollections TreeDictionary+CustomReflectable.swift
[120/366] Compiling HashTreeCollections TreeDictionary+Debugging.swift
[161/366] Compiling HashTreeCollections TreeSet+SetAlgebra isEqualSet.swift
[162/366] Compiling HashTreeCollections TreeSet+SetAlgebra isStrictSubset.swift
[163/366] Compiling HashTreeCollections TreeSet+SetAlgebra isStrictSuperset.swift
[164/366] Compiling HashTreeCollections TreeSet+SetAlgebra isSubset.swift
[165/366] Compiling HashTreeCollections TreeSet+SetAlgebra isSuperset.swift
[166/366] Compiling HashTreeCollections TreeSet+SetAlgebra subtract.swift
[167/366] Compiling HashTreeCollections TreeSet+SetAlgebra subtracting.swift
[168/366] Compiling HashTreeCollections TreeSet+SetAlgebra symmetricDifference.swift
[169/366] Compiling HashTreeCollections TreeSet+SetAlgebra union.swift
[170/366] Compiling HashTreeCollections TreeSet.swift
[179/370] Emitting module DequeModule
/host/spi-builder-workspace/Sources/DequeModule/_DequeBuffer.swift:44:14: warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
42 | /// The type-punned empty singleton storage instance.
43 | @usableFromInline
44 | internal let _emptyDequeStorage = _DequeBuffer<Void>.create(
   |              |- warning: let '_emptyDequeStorage' is not concurrency-safe because non-'Sendable' type 'ManagedBuffer<_DequeBufferHeader, Void>' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: annotate '_emptyDequeStorage' with '@MainActor' if property should only be accessed from the main actor
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |   minimumCapacity: 0,
46 |   makingHeaderWith: { _ in
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[202/371] Emitting module BitCollections
[211/371] Compiling _CollectionsTestSupport RepeatableRandomNumberGenerator.swift
[212/371] Compiling _CollectionsTestSupport SetAPIChecker.swift
[213/371] Compiling _CollectionsTestSupport SortedCollectionAPIChecker.swift
[214/371] Compiling _CollectionsTestSupport StringConvertibleValue.swift
[235/380] Compiling BitCollections BitSet.swift
[236/380] Compiling BitCollections Range+Utilities.swift
[237/380] Compiling BitCollections Slice+Utilities.swift
[238/380] Compiling BitCollections UInt+Tricks.swift
[239/380] Compiling BitCollections _Word.swift
[240/380] Compiling OrderedCollections OrderedSet.swift
[241/380] Compiling OrderedCollections _UnsafeBitset.swift
[242/380] Compiling BitCollections BitSet.Index.swift
[243/380] Compiling BitCollections BitSet._UnsafeHandle.swift
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[325/381] Emitting module OrderedCollections
[327/382] Compiling _RopeModule Rope+Join.swift
[328/382] Compiling _RopeModule Rope+MutatingForEach.swift
[329/382] Compiling _RopeModule Rope+Remove.swift
[330/382] Compiling _RopeModule Rope+RemoveSubrange.swift
[331/382] Compiling _RopeModule Rope+Split.swift
[332/382] Compiling _RopeModule Optional Utilities.swift
[333/382] Compiling _RopeModule String Utilities.swift
[334/382] Compiling _RopeModule String.Index+ABI.swift
[335/382] Compiling _RopeModule _CharacterRecognizer.swift
[336/382] Emitting module _RopeModule
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
[377/383] Emitting module _CollectionsTestSupport
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/AssertionContexts/TestContext.swift:23:23: warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 |   // FIXME: This ought to be a thread-local variable.
 23 |   internal static var _current: TestContext?
    |                       |- warning: static property '_current' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert '_current' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate '_current' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 |
 25 |   public init() {}
/host/spi-builder-workspace/Tests/_CollectionsTestSupport/MinimalTypes/MinimalDecoder.swift:182:16: warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
132 |
133 | extension MinimalDecoder {
134 |   final class KeyedContainer<Key: CodingKey> {
    |                              `- note: 'Key' previously declared here
135 |     typealias Value = MinimalEncoder.Value
136 |
    :
180 |   }
181 |
182 |   func _decode<Key: CodingKey>(key: Key) throws -> Value {
    |                `- warning: generic parameter 'Key' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
183 |     expectTrue(isValid, "Container isn't valid", trapping: true)
184 |     commitPendingContainer()
[384/384] Emitting module HashTreeCollections
/host/spi-builder-workspace/Sources/HashTreeCollections/HashNode/_HashNode+Storage.swift:29:14: warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
 27 | /// clean up after themselves in their `deinit` method.)
 28 | @usableFromInline
 29 | internal let _emptySingleton: _RawHashStorage = _RawHashStorage.create(
    |              |- warning: let '_emptySingleton' is not concurrency-safe because non-'Sendable' type '_RawHashStorage' (aka 'ManagedBuffer<_HashNodeHeader, _RawHashNode>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: annotate '_emptySingleton' with '@MainActor' if property should only be accessed from the main actor
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 30 |   minimumCapacity: 0,
 31 |   makingHeaderWith: { _ in _HashNodeHeader(byteCapacity: 0) })
Swift.ManagedBuffer:1:12: note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
1 | open class ManagedBuffer<Header, Element> where Element : ~Copyable {
  |            `- note: generic class 'ManagedBuffer' does not conform to the 'Sendable' protocol
2 |     final public var header: Header
3 |     @inlinable deinit
[386/387] Compiling Collections Collections.swift
[387/387] Emitting module Collections
Build complete! (47.85s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "swift-collections",
  "name" : "swift-collections",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "BitCollections",
      "targets" : [
        "BitCollections"
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      "type" : {
        "library" : [
          "automatic"
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      }
    },
    {
      "name" : "DequeModule",
      "targets" : [
        "DequeModule"
      ],
      "type" : {
        "library" : [
          "automatic"
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    {
      "name" : "HashTreeCollections",
      "targets" : [
        "HashTreeCollections"
      ],
      "type" : {
        "library" : [
          "automatic"
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      }
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    {
      "name" : "HeapModule",
      "targets" : [
        "HeapModule"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "OrderedCollections",
      "targets" : [
        "OrderedCollections"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "_RopeModule",
      "targets" : [
        "_RopeModule"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "Collections",
      "targets" : [
        "Collections"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "_RopeModule",
      "module_type" : "SwiftTarget",
      "name" : "_RopeModule",
      "path" : "Sources/RopeModule",
      "product_memberships" : [
        "_RopeModule",
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      "sources" : [
        "BigString/Basics/BigString+Builder.swift",
        "BigString/Basics/BigString+Contents.swift",
        "BigString/Basics/BigString+Debugging.swift",
        "BigString/Basics/BigString+Index.swift",
        "BigString/Basics/BigString+Ingester.swift",
        "BigString/Basics/BigString+Invariants.swift",
        "BigString/Basics/BigString+Iterators.swift",
        "BigString/Basics/BigString+Metrics.swift",
        "BigString/Basics/BigString+Summary.swift",
        "BigString/Basics/BigString.swift",
        "BigString/Chunk/BigString+Chunk+Append and Insert.swift",
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        "BigString/Chunk/BigString+Chunk+Indexing by Characters.swift",
        "BigString/Chunk/BigString+Chunk+Indexing by UTF16.swift",
        "BigString/Chunk/BigString+Chunk+RopeElement.swift",
        "BigString/Chunk/BigString+Chunk+Splitting.swift",
        "BigString/Chunk/BigString+Chunk.swift",
        "BigString/Conformances/BigString+BidirectionalCollection.swift",
        "BigString/Conformances/BigString+Comparable.swift",
        "BigString/Conformances/BigString+CustomDebugStringConvertible.swift",
        "BigString/Conformances/BigString+CustomStringConvertible.swift",
        "BigString/Conformances/BigString+Equatable.swift",
        "BigString/Conformances/BigString+ExpressibleByStringLiteral.swift",
        "BigString/Conformances/BigString+Hashing.swift",
        "BigString/Conformances/BigString+LosslessStringConvertible.swift",
        "BigString/Conformances/BigString+RangeReplaceableCollection.swift",
        "BigString/Conformances/BigString+Sequence.swift",
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        "BigString/Operations/BigString+Initializers.swift",
        "BigString/Operations/BigString+Insert.swift",
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        "BigString/Operations/BigString+RemoveSubrange.swift",
        "BigString/Operations/BigString+ReplaceSubrange.swift",
        "BigString/Operations/BigString+Split.swift",
        "BigString/Operations/Range+BigString.swift",
        "BigString/Views/BigString+UTF16View.swift",
        "BigString/Views/BigString+UTF8View.swift",
        "BigString/Views/BigString+UnicodeScalarView.swift",
        "BigString/Views/BigSubstring+UTF16View.swift",
        "BigString/Views/BigSubstring+UTF8View.swift",
        "BigString/Views/BigSubstring+UnicodeScalarView.swift",
        "BigString/Views/BigSubstring.swift",
        "Rope/Basics/Rope+Builder.swift",
        "Rope/Basics/Rope+Debugging.swift",
        "Rope/Basics/Rope+Invariants.swift",
        "Rope/Basics/Rope+_Node.swift",
        "Rope/Basics/Rope+_Storage.swift",
        "Rope/Basics/Rope+_UnmanagedLeaf.swift",
        "Rope/Basics/Rope+_UnsafeHandle.swift",
        "Rope/Basics/Rope.swift",
        "Rope/Basics/RopeElement.swift",
        "Rope/Basics/RopeMetric.swift",
        "Rope/Basics/RopeSummary.swift",
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        "Rope/Basics/_RopePath.swift",
        "Rope/Basics/_RopeVersion.swift",
        "Rope/Conformances/Rope+Collection.swift",
        "Rope/Conformances/Rope+Index.swift",
        "Rope/Conformances/Rope+Sequence.swift",
        "Rope/Operations/Rope+Append.swift",
        "Rope/Operations/Rope+Extract.swift",
        "Rope/Operations/Rope+Find.swift",
        "Rope/Operations/Rope+ForEachWhile.swift",
        "Rope/Operations/Rope+Insert.swift",
        "Rope/Operations/Rope+Join.swift",
        "Rope/Operations/Rope+MutatingForEach.swift",
        "Rope/Operations/Rope+Remove.swift",
        "Rope/Operations/Rope+RemoveSubrange.swift",
        "Rope/Operations/Rope+Split.swift",
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        "Utilities/String Utilities.swift",
        "Utilities/String.Index+ABI.swift",
        "Utilities/_CharacterRecognizer.swift"
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      "target_dependencies" : [
        "_CollectionsUtilities"
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      "type" : "library"
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      "name" : "_CollectionsUtilities",
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        "Compatibility/autogenerated/Array+WithContiguousStorage Compatibility.swift",
        "Compatibility/autogenerated/UnsafeMutableBufferPointer+SE-0370.swift",
        "Compatibility/autogenerated/UnsafeMutablePointer+SE-0370.swift",
        "Compatibility/autogenerated/UnsafeRawPointer extensions.swift",
        "IntegerTricks/autogenerated/FixedWidthInteger+roundUpToPowerOfTwo.swift",
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        "IntegerTricks/autogenerated/UInt+reversed.swift",
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        "autogenerated/UnsafeMutableBufferPointer+Extras.swift"
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      "module_type" : "SwiftTarget",
      "name" : "_CollectionsTestSupport",
      "path" : "Tests/_CollectionsTestSupport",
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        "AssertionContexts/Assertions.swift",
        "AssertionContexts/CollectionTestCase.swift",
        "AssertionContexts/Combinatorics.swift",
        "AssertionContexts/TestContext.swift",
        "ConformanceCheckers/CheckBidirectionalCollection.swift",
        "ConformanceCheckers/CheckCollection.swift",
        "ConformanceCheckers/CheckComparable.swift",
        "ConformanceCheckers/CheckEquatable.swift",
        "ConformanceCheckers/CheckHashable.swift",
        "ConformanceCheckers/CheckSequence.swift",
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        "MinimalTypes/MinimalEncoder.swift",
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        "MinimalTypes/MinimalIterator.swift",
        "MinimalTypes/MinimalMutableRandomAccessCollection.swift",
        "MinimalTypes/MinimalMutableRangeReplaceableRandomAccessCollection.swift",
        "MinimalTypes/MinimalRandomAccessCollection.swift",
        "MinimalTypes/MinimalRangeReplaceableRandomAccessCollection.swift",
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}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.