Submission fails with factory code about haskell-mooc HOT 4 CLOSED

I think you've accidentally edited the file. Perhaps your IDE suggests tuple sections? The code in the exercise template doesn't use tuple sections:

from haskell-mooc.

@opqdonut

The code in the exercise template doesn't use tuple sections

It does.

https://github.com/moocfi/haskell-mooc/blob/ghc-9/exercises/Set13b.hs#L301

It is standard practice to wait for OP to respond to a question before closing the ticket. Please reopen.

from haskell-mooc.

From your original message

Set13b.hs:337:16: error: Illegal tuple section: use TupleSections
    |
337 | msgSL msg = SL ((),,[msg])
    |                ^^^^^^^^^^^

From the source we both linked to:

msgSL msg = SL (\s -> ((),s,[msg])) 

Note the difference: ((),,[msg]) vs (\s -> ((),s,[msg])).

Sorry about closing the ticket, I didn't realise it was important to you to keep it open. Reopened.

from haskell-mooc.

@opqdonut Weird, I don’t remember changing the given code. I run hlint and ormolu on the code base, and am guessing the change came from one of those.
Sorry for the confusion and thank you for supporting this excellent course.

from haskell-mooc.