#1654: GHC Panic in 6.8.1
-----------------------------+----------------------------------------------
 Reporter:  [EMAIL PROTECTED]  |          Owner:            
     Type:  bug              |         Status:  new       
 Priority:  high             |      Milestone:  6.8 branch
Component:  Compiler         |        Version:  6.8.1     
 Severity:  major            |     Resolution:            
 Keywords:                   |     Difficulty:  Unknown   
 Testcase:                   |   Architecture:  x86       
       Os:  Linux            |  
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Comment (by guest):

 Hello again,

 I deleted the ghc-6.8.1 source, unpacked a clean copy, and created
 build.mk:
 {{{
 $ diff build.mk.sample build.mk
 11c11
 < #BuildFlavour = perf
 ---
 > BuildFlavour = perf
 32c32
 < SRC_HC_OPTS   = -H32m -O2
 ---
 > SRC_HC_OPTS   = -H128m -O2 -dcore-lint
 }}}
 I reproduced the error, but this time, even with core-lint enabled, didn't
 get the same dump as I did from 20070827. The panic message was merely
 what I obtained without the core-lint message enabled, as I posted
 before... well, almost... (s6e6 -> s6g6)
 {{{
 /home/matt/ghc-6.8.1/bin/ghc -H128m -O2 -dcore-lint  -istage1/utils
 -istage1/basicTypes  -istage1/types  -istage1/hsSyn  -istage1/prelude
 -istage1/rename  -istage1/typecheck  -istage1/deSugar  -istage1/coreSyn
 -istage1/vectorise  -istage1/specialise  -istage1/simplCore
 -istage1/stranal  -istage1/stgSyn  -istage1/simplStg  -istage1/codeGen
 -istage1/main  -istage1/profiling  -istage1/parser  -istage1/cprAnalysis
 -istage1/ndpFlatten  -istage1/iface  -istage1/cmm  -istage1/nativeGen
 -Wall -fno-warn-name-shadowing -fno-warn-orphans -Istage1 -cpp -fglasgow-
 exts -fno-generics -Rghc-timing -I. -Iparser -package unix -ignore-package
 lang -recomp -Rghc-timing  -H16M '-#include "cutils.h"' -DUSING_COMPAT
 -i../compat -ignore-package Cabal -package directory -package pretty
 -package containers    -c main/GHC.hs -o stage1/main/GHC.o  -ohi
 stage1/main/GHC.hi
 ghc-6.8.1: panic! (the 'impossible' happened)
   (GHC version 6.8.1 for i386-unknown-linux):
         nameModule show_mod{v s6g6}
 }}}
 The full log out output from configure and make, as usual, is attached as
 ghc-6.8.1-core-lint.bz2

 Matthew

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1654#comment:10>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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