[GHC] #11773: linux/powepc : ghc-stage1 segfaults when building unregisterised

[GHC]

#11773: linux/powepc : ghc-stage1 segfaults when building unregisterised
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        Reporter:  erikd                |                Owner:  erikd
            Type:  bug                  |               Status:  new
        Priority:  normal               |            Milestone:  8.2.1
       Component:  Compiler             |              Version:  8.1
      Resolution:                       |             Keywords:
Operating System:  Unknown/Multiple     |         Architecture:  powerpc
 Type of failure:  Building GHC failed  |            Test Case:
      Blocked By:                       |             Blocking:
 Related Tickets:                       |  Differential Rev(s):
       Wiki Page:                       |
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Comment (by erikd):

 If I add `-v2` to this command line I get:

 {{{
 Created temporary directory: /tmp/ghc8899_0
 *** C Compiler:
 *** ParseCmm [/tmp/ghc8899_0/ghc_1.cmmcpp]:
 !!! ParseCmm [/tmp/ghc8899_0/ghc_1.cmmcpp]: finished in 0.61 milliseconds,
                                             allocated 1.019 megabytes
 *** Deleting temp files:
 Warning: deleting non-existent /tmp/ghc8899_0/ghc_4.c
 Warning: deleting non-existent /tmp/ghc8899_0/ghc_3.hc
 *** Deleting temp dirs:
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.1.20160330 for powerpc-unknown-linux):
         hscCmmFile: no_mod
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11773#comment:1>
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