[GHC] #12152: panic: Loading temp shared object failed

[GHC]

#12152: panic: Loading temp shared object failed
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        Reporter:  crockeea          |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.2
       Component:  Compiler          |              Version:  7.8.1
  (Linking)                          |
      Resolution:  fixed             |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHCi crash        |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by toonn):

 I think I ran into this with 8.2.2:

 {{{
 Loading cabal new-repl --ghc-options=-fobject-code test-suite:mpw ...
 Build profile: -w ghc-8.2.2 -O1
 In order, the following will be built (use -v for more details):
  - skeletonkey-0.0.0.0 (test:mpw) (file tests/Main.hs changed)
 Preprocessing test suite 'mpw' for skeletonkey-0.0.0.0..
 GHCi, version 8.2.2: http://www.haskell.org/ghc/  :? for help

 <no location info>: warning: [-Wmissing-home-modules]
     These modules are needed for compilation but not listed in your .cabal
 file's other-modules: KDF

                  MAC

                  MPAlgorithm

                  MPW.Path

                  MPW.Test

                  MPWTemplates

                  Types
 Ok, 8 modules loaded.

 All good (8 modules, at 13:42:23)
 Running test...






 ghc: panic! (the 'impossible' happened)
   (GHC version 8.2.2 for x86_64-unknown-linux):
         Loading temp shared object failed: /tmp/ghc24637_0/libghc_3.so:
 undefined symbol: MPWziPath_mpwTestsXml_closure

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


 ...done

 }}}

 I created `MPW.Path` so I could avoid having `{-# LANGUAGE CPP #-}` in
 `MPW.Tests` because that doesn't agree with string gaps.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12152#comment:11>
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