Circular Reference Compilation Error when Compiling with Xcode 6.0 Beta Tools

[mikelikespie]

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Before you submit an issue, please complete the report with all the relevant details for your bug and go through every item in the checklist.

Describe the bug
A clear and concise description of what the bug is.

Checklist

• I can reproduce this issue with a vanilla SwiftUI project.
• I can reproduce this issue using the main branch of this package.
• This bug hasn't been addressed in an existing GitHub issue.

Steps to reproduce

1. Using the new xcode 6 beta, try building the project or run swift build with new CLI tools selected

Expected behavior
It to build

Screenshots

error: emit-module command failed with exit code 1 (use -v to see invocation)
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
/Users/ml/code/swift-markdown-ui/Sources/MarkdownUI/Parser/InlineNode.swift:3:7: note: through reference here
 1 | import Foundation
 2 | 
 3 |  enum InlineNode: Hashable {
   |       |- note: through reference here
   |       |- note: through reference here
   |       `- note: through reference here
 4 |   case text(String)
 5 |   case softBreak
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
/Users/ml/code/swift-markdown-ui/Sources/MarkdownUI/Parser/InlineNode.swift:3:7: note: through reference here
 1 | import Foundation
 2 | 
 3 |  enum InlineNode: Hashable {
   |       |- note: through reference here
   |       |- note: through reference here
   |       `- note: through reference here
 4 |   case text(String)
 5 |   case softBreak
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: error: circular reference
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
<unknown>:0: note: through reference here
/Users/ml/code/swift-markdown-ui/Sources/MarkdownUI/Parser/InlineNode.swift:3:7: note: through reference here
 1 | import Foundation
 2 | 
 3 |  enum InlineNode: Hashable {
   |       |- note: through reference here
   |       |- note: through reference here
   |       `- note: through reference here
 4 |   case text(String)
 5 |   case softBreak

Version information

• MarkdownUI: c0daf6e
• OS: macos 14.5 (23F79)
• Xcode: Version 16.0 beta (16A5171c)

Additional context
Add any other context about the problem here.

[electricsidecar-dev]

I've submitted FB13830058 to Apple for this bug.

I've isolated the bug down to the following minimally reproducible sample:

indirect enum BlockNode: Hashable {
  case paragraph(content: [InlineNode])
}

indirect enum InlineNode: Hashable {
  case emphasis(children: [InlineNode])
}

[electricsidecar-dev]

Oddly, the following snippet builds:

indirect enum BlockNode {
  case paragraph(content: InlineNode)
}

indirect enum InlineNode {
  case foo
  case emphasis(children: [InlineNode])
}

but this one does not:

indirect enum BlockNode {
  case paragraph(content: [InlineNode])
}

indirect enum InlineNode {
  case foo
  case emphasis(children: [InlineNode])
}

[electricsidecar-dev]

More fun: the following builds

indirect enum BlockNode {
  case paragraph([InlineNode])
}

indirect enum InlineNode {
  case foo
  case emphasis(children: [InlineNode])
}

but this does not:

indirect enum BlockNode {
  case paragraph(content: [InlineNode])
}

indirect enum InlineNode {
  case foo
  case emphasis(children: [InlineNode])
}

[electricsidecar-dev]

I've got a buildable patch working locally. Will send up a PR.

[JoshuaRileyDev]

How can I reference that PR in Xcode? Or does it need to be approved

[electricsidecar-dev]

Something like this in your Package.swift should work until this PR is merged:

    dependencies: [
        .package(url: "https://github.com/electricsidecar-dev/swift-markdown-ui.git", .branch("recursive")),
    ],

[gonzalezreal]

@electricsidecar-dev Thank you for investigating this and coming up with a workaround. I hope they fix it in the upcoming Xcode 16 betas. Great work! ❤️

[alexsllater]

please push update

[gonzalezreal]

Fixed by #328