[GHC] #7225: "ghc -C" failed

[GHC]

#7225: "ghc -C" failed
--------------------------------+-------------------------------------------
 Reporter:  guest               |          Owner:          
     Type:  bug                 |         Status:  new     
 Priority:  normal              |      Component:  Compiler
  Version:  7.4.1               |       Keywords:          
       Os:  Windows             |   Architecture:  x86     
  Failure:  Compile-time crash  |       Testcase:          
Blockedby:                      |       Blocking:          
  Related:                      |  
--------------------------------+-------------------------------------------
 --- source file ---
 module Main where

 main = return ()

 --- command line ---
 E:\DANE\wisnipr2\Temp>ghc -C Main.hs

 addFlag by -C on the commandline:
     Warning: The -fvia-C flag does nothing; it will be removed in a future
 GHC release
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.4.1 for i386-unknown-mingw32):
         pipeLoop: at phase As but I wanted to stop at phase HCc

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7225>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler