[GHC] #10631: Report of GHC Panic

[GHC]

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