Using MarkdownUI with Splash causes a crash on a long-ish markdown on app launch

[knlshh]

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Describe the bug
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Using MarkdownUI with Splash causes a crash on a long-ish markdown on app launch.

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
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1. Run the attached app on a physical device and the app will crash on startup.
2. The stacktrace that Xcode shows for the crash points to @main in MarkdownScrollViewCrashApp, but I've narrowed it down to Builder's build method.

Expected behavior
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1. App should not crash on startup and markdown should render.

Screenshots
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Version information

• MarkdownUI: 2.1.0
• OS: iOS 16.4 (running on a physical device, not a simulator)
• Xcode: 14.3

Additional context
Add any other context about the problem here.

If you reduce the size of the sample text, the markdown renders correctly. From my debugging, I've found that
accumulatedText.reduce(Text(""), +) in TextOutputFormat is the culprit. I suspect that the memory of the underlying text storage is being released leading to a bad access.

Sample project - MarkdownScrollViewCrash.zip

[gonzalezreal]

Hi @knlshh,

If the problem does not stem from MarkdownUI and is instead related to the TextOutputFormat sample code or Splash, I recommend posting about it in a discussion and closing this issue. What do you think?

[gonzalezreal]

Closing as the described issue does not stem from MarkdownUI. Feel free to create a discussion on better integrating Splash with MarkdownUI.

[ondrejkorol]

I was able to resolve this by using AttributedString in TextOutputFormat.