[Haskell-cafe] Why do I see the escape chars in Emacs with haskell-mode

[Henry Laxen]

Dear Cafe,

Greeting Gentle Haskellers,

I know this may really be a question for the emacs guys, but I thought
for sure someone here has encoutered the same thing and would
recognize the problem right away.

Here is my progam:

module Main where
main = xprint "hi"

Yes, xprint is intensional, I want an error.

I am in haskell mode in emacs.  I type C-c C-l running
haskell-process-load-file, and get:

Hours of hacking await!
If I break, you can:
  1. Restart:           M-x haskell-process-restart
  2. Configure logging: C-h v haskell-process-log (useful for debugging)
  3. General config:    M-x customize-mode
  4. Hide these tips:   C-h v haskell-process-show-debug-tips
.[;1m/home/henry/a.hs:2:8-13: .[;1m.[31merror:.[0m.[0m.[;1m.[0m.[0m.[;1m …
    • Variable not in scope: xprint :: [Char] -> t
    • Perhaps you meant ‘print’ (imported from Prelude).[0m.[0m
.[;1m/home/henry/a.hs:2:8-13: .[;1m.[31merror:.[0m.[0m.[;1m.[0m.[0m.[;1m …
    • Variable not in scope: xprint :: [Char] -> t
    • Perhaps you meant ‘print’ (imported from Prelude).[0m.[0m
Compilation failed.

but when I swich to the *haskell* buffer and type :r, I get the
beautiful, colorized message:

[1 of 1] Compiling Main             ( /home/henry/a.hs, interpreted )

/home/henry/a.hs:2:8-13: error:
    • Variable not in scope: xprint :: [Char] -> t
    • Perhaps you meant ‘print’ (imported from Prelude)
  |
2 | main = xprint "hi"
  |        ^^^^^^
Failed, no modules loaded.

Where the escape sequences have been interpreted correctly.  What do I
have misconfigured?  Please point me in a direction.  Thanks in
advance.

Best wishes,
Henry Laxen

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