Unicode symbols inside ghci prompt hang inferior-haskell-mode

[adinapoli]

I've discovered this by chance, because my office's laptop has a .ghci file which sets the prompt to "ghci", but my home laptop set it to "λ> ".

With my surprise, this hang Emacs completely.

Any clue? Maybe it could be worthwhile to add a note in the README to avoid too much headaches :)

[hvr]

The problem with "λ> " is that the current comint-prompt-regexp (i.e. "^\\*?[[:upper:]][\\._[:alnum:]]*\\(?: \\*?[[:upper:]][\\._[:alnum:]]*\\)*> \\|^> $") doesn't match anymore, so inf-haskell hangs waiting for a prompt to appear which never will...

[adinapoli]

Thanks for the prompt reply :)
A.

[fosskers]

Please merge that commit. The problem still exists.

[chrisdone]

@fosskers Merge into what?

[fosskers]

Oh, I suppose it hasn't been made into a pull request. @hvr Do your changes actually fix it?

[unhammer]

Why the final $? I had to remove it to use the λ in ob-haskell.el, since org-babel expects to be able to split-string on comint-prompt-regexp.