id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
4425,"the ""impossible happened"" while building regex-posix-0.94.4 with GHC 7",dleuschner,,"Here's the output...

Configuring regex-posix-0.94.4...
Preprocessing library regex-posix-0.94.4...
Building regex-posix-0.94.4...
[1 of 6] Compiling Text.Regex.Posix.Wrap ( dist/build/Text/Regex/Posix/Wrap.hs, dist/build/Text/Regex/Posix/Wrap.o )
SpecConstr
    Function `lvl_s2xM{v} [lid]'
      has three call patterns, but the limit is 0
    Use -fspec-constr-count=n to set the bound
    Use -dppr-debug to see specialisations
ghc: panic! (the 'impossible' happened)
  (GHC version 7.0.0.20100924 for x86_64-unknown-linux):
        initC: srt_lbl

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


By the way: I got lots of the ""SpecConstr"" warnings while building other packages.",bug,closed,normal,,Compiler,7.0.1 RC1,duplicate,,,Linux,x86_64 (amd64),Compile-time crash,,,,,