[GHC] #7680: -prof build: trying to 'show' a 'Double' leads to 'Char.intToDigit: not a digit' crash

[GHC]

#7680: -prof build: trying to 'show' a 'Double' leads to 'Char.intToDigit: not a
digit' crash
-------------------------------+--------------------------------------------
    Reporter:  slyfox          |       Owner:                  
        Type:  bug             |      Status:  new             
    Priority:  normal          |   Milestone:                  
   Component:  Compiler        |     Version:  7.6.2           
    Keywords:                  |          Os:  Unknown/Multiple
Architecture:  x86_64 (amd64)  |     Failure:  None/Unknown    
  Difficulty:  Unknown         |    Testcase:                  
   Blockedby:                  |    Blocking:                  
     Related:                  |  
-------------------------------+--------------------------------------------

Comment(by slyfox):

 My '''mk/build.mk''':

 {{{
 # Gentoo changes
 docdir = /usr/share/doc/ghc-7.6.2
 htmldir = /usr/share/doc/ghc-7.6.2
 SRC_HC_OPTS+= -optc-march=corei7-avx -opta-march=corei7-avx -optc-
 mtune=corei7-avx -opta-mtune=corei7-avx -optc-ggdb -optl-Wl,--hash-
 style=gnu -optc-Wa,--noexecstack -opta-Wa,--noexecstack
 SRC_CC_OPTS+=-march=corei7-avx -mtune=corei7-avx -O2 -pipe -ggdb
 -march=corei7-avx -march=corei7-avx -mtune=corei7-avx -mtune=corei7-avx
 -ggdb -Wa,--noexecstack -Wa,--noexecstack
 SRC_LD_OPTS+= -Wl,--hash-style=gnu
 BUILD_DOCBOOK_PDF  = NO
 BUILD_DOCBOOK_PS   = NO
 BUILD_DOCBOOK_HTML = NO
 HADDOCK_DOCS       = NO
 SRC_HC_OPTS+=-w
 GhcWithLlvmCodeGen=NO
 INTEGER_LIBRARY=integer-gmp
 }}}

 I guess -march breaks some RTS bits.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7680#comment:4>
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