Fable is failing in CI, may need to be updated to latest Fable 5.0 #334

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1. dsyme commented on Aug 24, 2026

   

   dsyme

   on Aug 24, 2026

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   /repo-assist Try to fix this please

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2. github-actions commented on Aug 24, 2026

   

   github-actionsBot

   on Aug 24, 2026 – with GitHub Actions

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3. github-actions

   added a commit that references this issue on Aug 24, 2026

   Fix Fable CI build: unpin Microsoft.Bcl.AsyncInterfaces version

   ...

   This issue will close once commit 7982313 is merged into the 'main' branch.

   7982313
4. github-actions commented on Aug 24, 2026

   

   github-actionsBot

   on Aug 24, 2026 – with GitHub Actions

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   🤖 This is an automated response from Repo Assist.

   Thanks for the report! I found the root cause: Microsoft.Bcl.AsyncInterfaces was pinned to 10.0.7 in FSharp.Control.AsyncSeq.fsproj, while System.Threading.Channels (using Version="*") resolved to a newer version requiring Microsoft.Bcl.AsyncInterfaces >= 10.0.11. This triggered an NU1605 package downgrade warning, which causes Fable's MSBuild project cracker to throw an unhandled exception and abort — this wasn't a Fable 5.0 compatibility issue.

   I've opened a draft PR that unpins the version (matching the existing * convention already used for System.Threading.Channels). Verified locally: full dotnet test (476/476 passing) and npm test under tests/fable (78/78 passing, previously failing with the unhandled exception).

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5. dsyme

   closed this as completedin #335on Aug 25, 2026