[GHC] #9050: Panic when compiling cmm file together with -outputdir

[GHC]

#9050: Panic when compiling cmm file together with -outputdir
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        Reporter:  Yuras               |            Owner:
            Type:  bug                 |           Status:  patch
        Priority:  normal              |        Milestone:
       Component:  Compiler            |          Version:  7.8.2
      Resolution:                      |         Keywords:
Operating System:  Unknown/Multiple    |     Architecture:
 Type of failure:  Compile-time crash  |  Unknown/Multiple
       Test Case:                      |       Difficulty:  Unknown
        Blocking:                      |       Blocked By:
                                       |  Related Tickets:
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Changes (by Yuras):

 * status:  new => patch


Comment:

 This issue is a bit annoying for me. I'm working with manually written cmm
 files, and I'm using -outputdir option a lot.

 I tried to replace the `panic` with dummy module, and it works. But I'm a
 bit concerned about module name clashes. Instead I removed the code that
 forces the thunk, ghc doesn't support compiling external core anyway.

 Probably it is better to replace `Module` with `Maybe Module` to be
 explicit, but it leads to a huge diff.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9050#comment:1>
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