haddock fails to parse {- # ... #-} (note the space) pragma

[slyfox]

The problem was found on xmonad-0.9.2 haddock failure.

Minimal complete test looks as such:

$ haddock Fail.hs 

Fail.hs:1:3: parse error on input `#'
$ cat Fail.hs
{- # OPTIONS_GHC -fglasgow-exts    #-}

module Fail where

Reproducible with haddock-2.7.2 and 2.9.2.

[isaacdupree]

So:

That's not a pragma, according to Haskell standard (IIRC); it's a comment.

Next, Haddock looks at it as a comment, as it looks at all comments, to determine whether it is Haddockumentation.

Comments -- # or {- # denoted a Haddock-pragma in Haddock 0.x (rather as -- | and {- | denote Haddock-comments still). Could that be related?

[waern]

Comments -- # or {- # denoted a Haddock-pragma in Haddock 0.x (rather as -- | and {- | denote Haddock-comments still). Could that be related?

Yes, I think that's it. We still support that form, but we should probably just get rid of it.

[anonymous]

Milestone 2.9.0 deleted