`compile.to(ByteVector)` sometimes causes `java.lang.ClassCastException` in scala3
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bug
- Dominant language
- Scala
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- Avg merge
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- Merged PRs (30d)
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Description
I encountered this in a cross built app and it worked for 2.12/2.13
Here is a scastie repro from @ChristopherDavenport via Discord
I attempted my own repro before I found Chris's, and to(ByteVector) worked in the case I came up with, for example
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked Scastie reproduction and the compile.to(ByteVector) entry point; compare it with the working 2.12/2.13 cases and the second reproduction. Trace the Scala 3-specific failure and add a regression test covering the failing conversion. Done means the reproduction no longer throws ClassCastException while existing cases still pass.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- scala
- Domain
- stream-processing
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100