False positive: Main.hs (executable) does not recognise function defined in Lib.hs (library)

[mgpwilson]

Hello, I am having trouble with erroneous error messages from the linter.

The steps I have taken are:

1. Created a new Haskell Stack project with stack new <project-name>
2. Used stack setup
3. Created a function in Lib.hs and then used that function in Main.hs

Below are screenshots of the error I see.

Whenever I use stack run, the program compiles and runs as expected.

[jneira]

Hi, thanks for the bug report. Unfortunately the editor not always reflect changes on the fly, does the error persist after closing the editor, execute stack build in a console and reopening the editor?

[googleson78]

I think this is also related to #735 (same root issues?)

[jneira]

I think this is also related to #735 (same root issues?)

Yeah, thanks for linking the previous issue, not totally sure though

[mgpwilson]

Hi there,

Adding a hie.yaml file with the contents

cradle:
  stack:

seemed to fix the issue for me.

[googleson78]

I think this is also related to #735 (same root issues?)

Yeah, thanks for linking the previous issue, not totally sure though

I was linking it because I constantly get this "staleness" issue - if I add a new export to something in lib, hls won't detect in in another component, until I manually rebuild lib. And it seems related to me, because they're both related to intercomponent dependencies of some sort.

[jneira]

@mgpwilson

Hi there,

Adding a hie.yaml file with the contents

cradle:
  stack:

seemed to fix the issue for me.

Nice to see you can workaround the issue, have you got the opportunity to check if removing hie.yaml the issue is reproduced again?

[mgpwilson]

Hi @jneira

When I remove the hie.yaml file I get the following error:

When I reload developer window, that error is gone and the former error is reproduced:

Readding the hie.yaml fixes the error again.

[jneira]

Thanks for confirming it, @fendor does that behaviour make sense for you?