[GHC] #905: the `impossible' happened: ASSERT failed! file codeGen/ClosureInfo.lhs, line 596

[GHC]

#905: the `impossible' happened: ASSERT failed! file codeGen/ClosureInfo.lhs,
line 596
---------------------------------------------+------------------------------
 Reporter:  Misha Aizatulin <avatar at hot.ee>  |          Owner:         
     Type:  bug                              |         Status:  new    
 Priority:  normal                           |      Milestone:         
Component:  Compiler                         |        Version:  6.5    
 Severity:  normal                           |     Resolution:         
 Keywords:                                   |     Difficulty:  Unknown
 Testcase:                                   |   Architecture:  x86    
       Os:  Linux                            |  
---------------------------------------------+------------------------------
Changes (by Samuel Bronson <naesten at gmail.com>):

  * testcase:  =>
  * version:  6.4.2 => 6.5

Comment:

 This still happens with quasi-6.6 (calls itself 6.5...)...

 Same file, same line number! The module being built is even the same
 module!

 Also, it happens even when I only say:

 {{{
 WAY_p_HC_OPTS += -auto-all
 }}}

 not

 {{{
 SRC_HC_OPTS += -prof -auto-all
 }}}

 (I'm trying to track down increased allocation in some of the nofib
 programs caused by a patch I'm working on...)

 Here is the relevant portion of my build.mk file (I left out the part for
 BuildFlavour = perf, since I'm not using it here.)

 {{{
 BuildFlavour = devel
 #BuildFlavour = perf

 # Which warnings we like to use
 MyWarningOpts   = -W -fno-warn-unused-matches -fwarn-unused-imports

 WAY_p_HC_OPTS += -auto-all #-caf-all

 # -------- 1. A Development build
 --------------------------------------------

 ifeq "$(BuildFlavour)" "devel"

 GhcCompilerWays =

 SRC_HC_OPTS     = -H32m -O -fasm $(MyWarningOpts)
 GhcLibHcOpts    = -O -dcore-lint $(MyWarningOpts)
 GhcLibWays      = p

 # If you're working on the stage1 compiler, build stage1 with debugging:
 GhcStage1HcOpts = -Rghc-timing -O0 -DDEBUG

 # alternatively, to work on the stage 2 compiler:
 # GhcStage2HcOpts = -Rghc-timing -O0 -DDEBUG

 # profiled RTS
 #GhcRtsCcOpts =  -pg -g

 # Optimised/profiled RTS
 #GhcRtsCcOpts = -O2 -pg

 #GhcRtsWithFrontPanel = YES
 #SRC_HC_OPTS += `gtk-config --libs`

 SplitObjs = NO

 NoFibWays = p
 SRC_RUNTEST_OPTS += +RTS -H10m -RTS
 STRIP=:

 ifeq "$(way)" "p"
 SRC_RUNTEST_OPTS += +RTS -P -RTS
 endif

 endif
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/905>
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