Chokes on DOS style newlines in combination with preprocessor comments

[ezyang]

Under certain circumstances, DOS style newlines can cause Language.C to become unhappy.

ezyang@javelin:~$ cat min.i 
# 1 "foobar.h"

int main() {}
ezyang@javelin:~$ cat test.hs 
import Language.C
main = do
    (Right r) <- parseCFilePre "min.i"
    putStrLn "Ok"
ezyang@javelin:~$ runghc test.hs 
Ok
ezyang@javelin:~$ todos min.i 
ezyang@javelin:~$ runghc test.hs 
test.hs: user error (Pattern match failure in do expression at test.hs:3:4-12)

[ezyang]

The error given is:

min.i:1: (column 1) [ERROR]  >>> Syntax Error !
  Lexical error !
  The character '#' does not fit here.

[benedikt]

Thank you for the bug report; for line pragmas, the lexer did not deal with DOS style newlines correctly. This is now fixed in the darcs repository.

  Allow optional \r before \n (DOS newline) when lexing line pragmas 
  benedikt.huber@gmail.com**20100713230011
  Ignore-this: 4f8dc3973926b89e37f7e506a3d6710

[ezyang]

Awesome! Can't wait to see a release with this fix.