[GHC] #1051: Insufficient location information for parse errors before ''module'' keyword

[GHC]

#1051: Insufficient location information for parse errors before ''module''
keyword
----------------------------+-----------------------------------------------
    Reporter:  nfrisby      |       Owner:               
        Type:  bug          |      Status:  new          
    Priority:  normal       |   Milestone:               
   Component:  Compiler     |     Version:  6.6          
    Severity:  normal       |    Keywords:  error message
  Difficulty:  Easy (1 hr)  |    Testcase:               
Architecture:  Multiple     |          Os:  Multiple     
----------------------------+-----------------------------------------------
I've seen this error with GHC 6.6 on a PPC Mac (10.4.8), but I suspect it
 happens on multiple systems.

 Consider ''Main.hs''
 {{{
 module Main where

 import Test

 main = test
 }}}

 and ''Test.hs''
 {{{
 mmmodule Test where

 test = putStr "stutter"
 }}}

 The error message for trying to load the Main module is
 {{{
 $ ghci Main
 [snip]
 Loading package base ... linking ... done.

 <no location info>: file name does not match module name `Main'
 Failed, modules loaded: none.
 Prelude>
 }}}

 This provides no information regarding the actual location of the error.
 In a program of a considerable number of modules, the offending module can
 be difficult to track down. Moreover, the error provides no direct
 indication that there's a source file without the module keyword in it.

 The path of the offending file should be included in the error.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1051>
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