The master branch of Stack (8785d26) compiles and runs with lts-24.11 (GHC 9.10.2) and rio-0.1.22.0. However, allow that dependency to change to rio-0.1.23.0 (no other direct or indirect dependencies change), the stack package compiles but the built stack executable dies at runtime with GHC RTS message <<loop>>. For example:
> stack exec -- stack --verbose build --dry-run
...
2025-11-07 16:42:27.932799: [debug] Checking for project config at: D:\Users\mike\Code\GitHub\commercialhaskell\stack\stack.yaml
2025-11-07 16:42:27.932799: [debug] Loading project config file stack.yaml
2025-11-07 16:42:27.937842: [debug] Use of Casa server enabled: (CasaRepoPrefix "https://casa.stackage.org", 1280).
2025-11-07 16:42:27.953561: [debug] (SQL) SELECT COUNT(*) FROM "last_performed" WHERE ("action"=?) AND ("timestamp">=?); [PersistInt64 1,PersistUTCTime 2025-11-06 16:42:27.9535619 UTC]
2025-11-07 16:42:27.985345: [debug] Using package location completions from a lock file
2025-11-07 16:42:27.997118: [debug] Loaded snapshot from Pantry database.
2025-11-07 16:42:28.182185: [debug] Running Hpack on D:\Users\mike\Code\GitHub\commercialhaskell\stack\package.yaml
2025-11-07 16:42:28.257596: [debug] Hpack output unchanged in D:\Users\mike\Code\GitHub\commercialhaskell\stack\stack.cabal
2025-11-07 16:42:28.257596: [debug] Prefetching git repos: []
2025-11-07 16:42:28.257596: [debug] []
2025-11-07 16:42:28.273283: [debug] Asking for a supported GHC version
2025-11-07 16:42:28.782596: [error] <<loop>>
(Normally, that would have continued:
...
2025-11-07 17:47:16.198200: [debug] Prefetching git repos: []
2025-11-07 17:47:16.198200: [debug] []
2025-11-07 17:47:16.211883: [debug] Asking for a supported GHC version
2025-11-07 17:47:16.214743: [debug] Installed tools:
- msys2-20240727
...
- ghc-9.12.2
2025-11-07 17:47:16.214743: [debug] Potential GHC builds: standard
...
)
Could this issue be related?
The
masterbranch of Stack (8785d26) compiles and runs with lts-24.11 (GHC 9.10.2) andrio-0.1.22.0. However, allow that dependency to change torio-0.1.23.0(no other direct or indirect dependencies change), thestackpackage compiles but the builtstackexecutable dies at runtime with GHC RTS message<<loop>>. For example:(Normally, that would have continued:
)
Could this issue be related?