`directlySelectedComponents` sometimes contains values without a `name` attribute causing hard to troubleshoot error messages

[MangoIV]

Hi, I have a flake that uses the stackProject' function that, when trying to nix develop .#ghc90, errs with:

error: attribute 'name' missing

       at /nix/store/y0ms7njp08lwimby8wf6dbwv0m3ax4x7-source/lib/default.nix:136:37:

          135|     let
          136|       makePairs = map (p: rec { key=val.name; val=(p.components.library or p); });
             |                                     ^
          137|       closure = builtins.genericClosure {

I think the issues is caused by flatLibDepends being called by a depends = directlySelectedComponents that has attributes that don't have a name attribute, i.e. components hsPkgs is either incorrect or hsPkgs doesn't contain the right thing.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[hamishmack]

Is this still happening? What is the best way to reproduce it now?

[MangoIV]

I'm not sure, this has been quite some time and I apparently haven't documented the reproducer, I'm very sorry for that. I remember that it was fairly random and I think it went away when I deactivated haddock or something. Very sorry that I didn't put a hash.