[GHC] #8062: Panic "Lookup local fingerprint main:Main.main{v r6xE}"

[GHC]

#8062: Panic "Lookup local fingerprint main:Main.main{v r6xE}"
------------------------------------+---------------------------------
       Reporter:  tommd             |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.6.3
       Keywords:                    |  Operating System:  Linux
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
------------------------------------+---------------------------------
 When compiling some quickcheck tests for a larger internal project I
 receive the following error on my x86-64 Linux 3.10 system:

 {{{
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.6.3 for x86_64-unknown-linux):
         urk! lookup local fingerprint main:Main.main{v r6xE}

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

 System info:


 {{{
 $ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 7.6.3
 $ uname -a
 Linux Vodka 3.9.6-200.fc18.x86_64 #1 SMP Thu Jun 13 18:56:55 UTC 2013
 x86_64 x86_64 x86_64 GNU/Linux
 $ gcc --version
 gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8)
 Copyright (C) 2012 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.

 $ ld --version
 GNU ld version 2.23.51.0.1-6.fc18 20120806
 Copyright 2012 Free Software Foundation, Inc.
 This program is free software; you may redistribute it under the terms of
 the GNU General Public License version 3 or (at your option) a later
 version.
 This program has absolutely no warranty.
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8062>
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