cabal-install seems to pass new implicit flags to the compiler by default, which breaks doctest. #10915
Description
Information
- cabal-install version 3.15.0.0 (commit 2f3a45d, Tue Apr 8 00:30:30 2025 +0000)
- doctest version 0.24.0
## Bug
doctest's manual tells users to run it as a substitute haskell compiler:
cabal repl --with-compiler=doctest
However with cabal-head, the passing of unexpected flags to the compiler breaks.
❯ cabal repl --with-compiler=doctest
Warning: this is a debug build of cabal-install with assertions enabled.
Configuration is affected by the following files:
- cabal.project
Resolving dependencies...
Build profile: -w ghc-9.10.1 -O0
In order, the following will be built (use -v for more details):
- servant-0.20.2 (interactive) (lib) (cannot read state cache)
Warning: this is a debug build of cabal-install with assertions enabled.
Configuring library for servant-0.20.2...
Warning: this is a debug build of cabal-install with assertions enabled.
Preprocessing library for servant-0.20.2...
doctest: unrecognized option `--interactive'
Try `doctest --help' for more information.
Error: [Cabal-7125]
repl failed for servant-0.20.2.
This behaviour cannot be reproduced with the `3.15.0.0.2024.10.3 pre-release. I'm surprised cabal's own doctest suite is able to run at all.