[GHC] #10631: Report of GHC Panic

[GHC]

#10631: Report of GHC Panic
-------------------------------------+-------------------------------------
        Reporter:  seewalker         |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  low               |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
  (Linking)                          |
      Resolution:                    |                Keywords:
Operating System:  MacOS X           |            Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Description changed by bgamari:

Old description:

> I'll just copy here the error message; I wouldn't say I have the
> judgement to interpret it:
>
> ''ghc: panic! (the 'impossible' happened)
>   (GHC version 7.10.1 for x86_64-apple-darwin):
>         Loading temp shared object failed:
> dlopen(/var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib,
> 5): Symbol not found:
> _AlexSzuELoZZpfyhWUk8IXGTl3Kiel_ModulesziDBTypes_zdfPersistFieldLinkTag_closure
>   Referenced from:
> /var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib
>   Expected in: flat namespace
>  in
> /var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib
>
> Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug''
>
> This occurred while interactively developing a website with "yesod
> devel". After the compiler crashed, I killed the program, invoked "yesod
> devel" again without changing anything in my source code. This next time,
> no error occurred.

New description:

 I'll just copy here the error message; I wouldn't say I have the judgement
 to interpret it:

 {{{
 ''ghc: panic! (the 'impossible' happened)
   (GHC version 7.10.1 for x86_64-apple-darwin):
         Loading temp shared object failed:
 dlopen(/var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib,
 5): Symbol not found:
 _AlexSzuELoZZpfyhWUk8IXGTl3Kiel_ModulesziDBTypes_zdfPersistFieldLinkTag_closure
   Referenced from:
 /var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib
   Expected in: flat namespace
  in
 /var/folders/84/5rj51n8x70g4km60lfh_ds1m0000gt/T/ghc22694_0/libghc22694_107.dylib

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

 This occurred while interactively developing a website with "yesod devel".
 After the compiler crashed, I killed the program, invoked "yesod devel"
 again without changing anything in my source code. This next time, no
 error occurred.

--

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10631#comment:2>
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