[GHC] #365: GHC dies silently with faulty preprocessor

[GHC]

#365: GHC dies silently with faulty preprocessor
-------------------------------------+-------------------------------------
        Reporter:  josefs            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  closed => new
 * os:   => Windows
 * failure:   => None/Unknown
 * version:  6.4 => 7.11
 * architecture:   => Unknown/Multiple
 * owner:  simonmar =>
 * resolution:  Fixed =>


Old description:

> {{{
> This is perhaps a minor nuisance but I had to spend
> quite some time to track down my bug. When ghc is given
> a preprocessor which for some reason cannot execute
> then ghc just dies silently without giving any
> indication as to what the problem was. It would be nice
> with a little message hinting at the problem on stderr.
>
> Oh, and by the way, the -F flag doesn't have any
> documentation. It is only mentioned together with -optF.
> }}}

New description:

 {{{
 This is perhaps a minor nuisance but I had to spend
 quite some time to track down my bug. When ghc is given
 a preprocessor which for some reason cannot execute
 then ghc just dies silently without giving any
 indication as to what the problem was. It would be nice
 with a little message hinting at the problem on stderr.

 Oh, and by the way, the -F flag doesn't have any
 documentation. It is only mentioned together with -optF.
 }}}

--

Comment:

 This is still an issue.

 {{{
 $ echo 'main = return ()' > hello.hs
 $ touch wibble                          # The faulty preprocessor.
 $ chmod +x wibble
 $ ghc -F -pgmF ./wibble -c hello.hs     # Note: no error message.
 $ echo $?                               # But the command failed.
 1
 }}}

 Compiling with `-v` shows:
 {{{
 *** Haskell pre-processor:
 "./wibble" "hello.hs" "hello.hs" "C:\msys64\tmp\ghc3020_0\ghc3020_1.hspp"


 Failed: "./wibble" "hello.hs" "hello.hs"
 "C:\msys64\tmp\ghc3020_0\ghc3020_1.hspp" ./wibble: runInteractiveProcess:
 invalid argument (Exec format error)
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/365#comment:4>
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