`stack build --haddock-executables` does not build docs for executable

[sjshuck]

General summary/comments (optional)

I have an executable defined in my package.yaml but no library. When I run stack build --haddock-executables as some docs seems to suggest I can, it just compiles my executable but doesn't mention anything about docs, as it would when successfully running stack haddock in a project with a library.

Using:

• Stack 3.7.1
• GHC 9.10.3
• Cabal 3.16.0.0

Steps to reproduce

1. stack new --snapshot lts-24.19 reproduce
2. Remove from the package.yaml the library and tests top-level entries and the dependencies of the executable
3. Remove the import from app/Main.hs and redefine main = return ()
4. stack build --haddock-executables

Expected

The executable should build and a message should appear stating the path to a generated index.html.

Actual

Only the executable builds.

[mpilgrem]

@sjshuck, thanks for reporting. I'll see if I can work out what is going on. As an aside, GHC 9.10.3 comes with Cabal-3.12.1.0 (which is what Stack then uses to build), not Cabal-3.16.0.0.

[sjshuck]

Tried Cabal 3.12.1.0, same results.