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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 Markdown with Swift 5.9 for macOS (SPM).

Build Command

Build command unavailable

Build Log

========================================
RunAll
========================================
Builder version: 4.27.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/twostraws/markdown.git
Reference: main
Initialized empty Git repository in /Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/twostraws/markdown
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at ad895d1 Updated README.
Cloned https://github.com/twostraws/markdown.git
Revision (git rev-parse @):
ad895d1cd77d4f6b6775497cbff7b0c5995f7485
SUCCESS checkout https://github.com/twostraws/markdown.git at main
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "markdown",
      "name": "Markdown",
      "url": "https://github.com/twostraws/markdown.git",
      "version": "unspecified",
      "path": "/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/markdown",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/twostraws/markdown.git
[1/21] Fetching markdown
Fetched https://github.com/twostraws/markdown.git (0.22s)
Creating working copy for https://github.com/twostraws/markdown.git
Working copy of https://github.com/twostraws/markdown.git resolved at main
warning: '.resolve-product-dependencies': dependency 'markdown' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD/checkout
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.0.0.app xcrun swift build --arch arm64
Building for debugging...
error: emit-module command failed with exit code 1 (use -v to see invocation)
[1/3] Emitting module Markdown
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
[2/3] Compiling Markdown ParseOptions.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
[3/3] Compiling Markdown Markdown.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
error: fatalError
warning: you may be able to install libmarkdown using your system-packager:
    brew install discount
[0/1] Planning build
Building for debugging...
error: emit-module command failed with exit code 1 (use -v to see invocation)
[1/3] Emitting module Markdown
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
[2/3] Compiling Markdown ParseOptions.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
[3/3] Compiling Markdown Markdown.swift
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "discount.h"
        ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/discount/discount.h:1:10: error: 'mkdio.h' file not found
#include <mkdio.h>
         ^
/Users/admin/builds/J1XnyXFH/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/Markdown/Markdown.swift:1:8: error: could not build Objective-C module 'Discount'
import Discount
       ^
error: fatalError
warning: you may be able to install libmarkdown using your system-packager:
    brew install discount
BUILD FAILURE 5.9 macosSpm