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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

Failed to build SwiftMarkdown, reference 0.7.1 (f0cdf1), with Swift 6.0 for macOS (SPM) on 2 Nov 2024 00:13:06 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/vapor-community/markdown.git
Reference: 0.7.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vapor-community/markdown
 * tag               0.7.1      -> FETCH_HEAD
HEAD is now at f0cdf12 Merge pull request #13 from vapor-community/enable-55-ci
Cloned https://github.com/vapor-community/markdown.git
Revision (git rev-parse @):
f0cdf125947c06685ebaef633fd00ae5247a1cfc
SUCCESS checkout https://github.com/vapor-community/markdown.git at 0.7.1
Fetching https://github.com/brokenhandsio/cmark-gfm.git
[1/12300] Fetching cmark-gfm
Fetched https://github.com/brokenhandsio/cmark-gfm.git from cache (1.40s)
Computing version for https://github.com/brokenhandsio/cmark-gfm.git
Computed https://github.com/brokenhandsio/cmark-gfm.git at 2.1.0 (0.66s)
Creating working copy for https://github.com/brokenhandsio/cmark-gfm.git
Working copy of https://github.com/brokenhandsio/cmark-gfm.git resolved at 2.1.0
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "markdown",
      "name": "SwiftMarkdown",
      "url": "https://github.com/vapor-community/markdown.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/markdown",
      "dependencies": [
        {
          "identity": "cmark-gfm",
          "name": "cmark",
          "url": "https://github.com/brokenhandsio/cmark-gfm.git",
          "version": "2.1.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/cmark-gfm",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/vapor-community/markdown.git
[1/246] Fetching markdown
Fetched https://github.com/vapor-community/markdown.git from cache (0.66s)
Fetching https://github.com/brokenhandsio/cmark-gfm.git from cache
Fetched https://github.com/brokenhandsio/cmark-gfm.git from cache (0.51s)
Computing version for https://github.com/brokenhandsio/cmark-gfm.git
Computed https://github.com/brokenhandsio/cmark-gfm.git at 2.1.0 (0.03s)
Creating working copy for https://github.com/brokenhandsio/cmark-gfm.git
Working copy of https://github.com/brokenhandsio/cmark-gfm.git resolved at 2.1.0
Creating working copy for https://github.com/vapor-community/markdown.git
Working copy of https://github.com/vapor-community/markdown.git resolved at 0.7.1 (f0cdf12)
warning: '.resolve-product-dependencies': dependency 'markdown' is not used by any target
Found 1 product dependencies
  - cmark
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/vapor-community/markdown.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/36] Write swift-version--7754E27361AE5C74.txt
[1/36] Compiling cmark cmark_ctype.c
[2/36] Compiling cmark core-extensions.c
[3/36] Compiling cmark footnotes.c
[4/36] Compiling cmark syntax_extension.c
[5/36] Compiling cmark tasklist.c
[6/36] Compiling cmark cmark.c
[7/36] Compiling cmark buffer.c
[8/36] Compiling cmark strikethrough.c
[9/36] Compiling cmark tagfilter.c
[10/36] Compiling cmark render.c
[11/36] Compiling cmark utf8.c
[12/36] Compiling cmark table.c
[13/36] Compiling cmark xml.c
[14/36] Compiling cmark registry.c
[15/36] Compiling cmark ext_scanners.c
[16/36] Compiling cmark plugin.c
[17/36] Compiling cmark references.c
[18/36] Compiling cmark plaintext.c
[19/36] Compiling cmark node.c
[20/36] Compiling cmark map.c
[21/36] Compiling cmark linked_list.c
[22/36] Compiling cmark commonmark.c
[23/36] Compiling cmark man.c
[24/36] Compiling cmark iterator.c
[25/36] Compiling cmark html.c
[26/36] Write sources
[27/36] Compiling cmark scanners.c
[28/36] Compiling cmark houdini_html_e.c
[29/36] Compiling cmark houdini_href_e.c
[30/36] Compiling cmark inlines.c
[31/36] Compiling cmark houdini_html_u.c
[32/36] Compiling cmark arena.c
[33/36] Compiling cmark blocks.c
[34/36] Compiling cmark latex.c
[35/36] Compiling cmark autolink.c
[37/38] Emitting module SwiftMarkdown
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:17:23: warning: static property 'sourcePosition' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
15 |     }
16 |
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
   |                       |- warning: static property 'sourcePosition' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'sourcePosition' 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
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:18:23: warning: static property 'hardBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
16 |
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
   |                       |- warning: static property 'hardBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'hardBreaks' 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
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:19:23: warning: static property 'safe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
   |                       |- warning: static property 'safe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'safe' 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
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:20:23: warning: static property 'noBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
   |                       |- warning: static property 'noBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'noBreaks' 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
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:21:23: warning: static property 'normalize' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
   |                       |- warning: static property 'normalize' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'normalize' 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
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:22:23: warning: static property 'validateUTF8' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
   |                       |- warning: static property 'validateUTF8' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'validateUTF8' 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
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
24 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:23:23: warning: static property 'smartQuotes' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
   |                       |- warning: static property 'smartQuotes' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'smartQuotes' 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 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
25 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:24:23: warning: static property 'unsafe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
24 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
   |                       |- warning: static property 'unsafe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'unsafe' 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
25 | }
26 |
[38/38] Compiling SwiftMarkdown SwiftMarkdown.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:17:23: warning: static property 'sourcePosition' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
15 |     }
16 |
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
   |                       |- warning: static property 'sourcePosition' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'sourcePosition' 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
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:18:23: warning: static property 'hardBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
16 |
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
   |                       |- warning: static property 'hardBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'hardBreaks' 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
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:19:23: warning: static property 'safe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
17 |     static public let sourcePosition = MarkdownOptions(rawValue: 1 << 1)
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
   |                       |- warning: static property 'safe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'safe' 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
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:20:23: warning: static property 'noBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
18 |     static public let hardBreaks = MarkdownOptions(rawValue: 1 << 2)
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
   |                       |- warning: static property 'noBreaks' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'noBreaks' 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
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:21:23: warning: static property 'normalize' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
19 |     static public let safe = MarkdownOptions(rawValue: 1 << 3)
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
   |                       |- warning: static property 'normalize' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'normalize' 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
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:22:23: warning: static property 'validateUTF8' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
20 |     static public let noBreaks = MarkdownOptions(rawValue: 1 << 4)
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
   |                       |- warning: static property 'validateUTF8' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'validateUTF8' 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
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
24 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:23:23: warning: static property 'smartQuotes' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
21 |     static public let normalize = MarkdownOptions(rawValue: 1 << 8)
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
   |                       |- warning: static property 'smartQuotes' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'smartQuotes' 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 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
25 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:24:23: warning: static property 'unsafe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | }
 9 |
10 | public struct MarkdownOptions: OptionSet {
   |               `- note: consider making struct 'MarkdownOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int32
12 |
   :
22 |     static public let validateUTF8 = MarkdownOptions(rawValue: 1 << 9)
23 |     static public let smartQuotes = MarkdownOptions(rawValue: 1 << 10)
24 |     static public let unsafe = MarkdownOptions(rawValue: 1 << 17)
   |                       |- warning: static property 'unsafe' is not concurrency-safe because non-'Sendable' type 'MarkdownOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'unsafe' 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
25 | }
26 |
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:31:60: error: cannot find 'strlen' in scope
29 |     try str.withCString {
30 |
31 |         guard let buf = cmark_gfm_markdown_to_html($0, Int(strlen($0)), options.rawValue) else {
   |                                                            `- error: cannot find 'strlen' in scope
32 |             throw MarkdownError.conversionFailed
33 |         }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:36:9: error: cannot find 'free' in scope
34 |
35 |         buffer = String(cString: buf)
36 |         free(buf)
   |         `- error: cannot find 'free' in scope
37 |     }
38 |     guard let output = buffer else {
BUILD FAILURE 6.0 macosSpm