id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3118,ghc: panic! (the 'impossible' happened): Missing alternative,calvins,,"When I include the -auto-all option (in addition to -prof) on the entry for Main in my Cabal file, I get the ghc panic message below. Full compile output attached.


{{{
[10 of 10] Compiling Main             ( Rdf4hParseMain.hs, dist/build/rdf4h/rdf4h-tmp/Main.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 6.10.1 for x86_64-unknown-linux):
	Missing alternative
    main:Main.OutputFormat{d r16LZ}
    (main:Main.Help{d r16M9}, [], lvl_s17ar{v} [lid])
    (main:Main.Debug{d r16M7}, [], lvl_s17as{v} [lid])
    (main:Main.Version{d r16M5}, [], lvl_s17at{v} [lid])

}}}

To reproduce the bug, check out a tagged version of the code using:

darcs get -t 'ghc bug report' http://protempore.net/rdf4h

And then edit the cabal file by adding ""-prof -auto-all"" to the library and main entries, and you should see what I see above if it's reproducible. It compiles fine if the options are only added to the library block, and it compiles fine if '-prof' but not '-auto-all' is added to the executable block, but fails when '-prof' and '-auto-all' are both added to the executable block.
",bug,closed,normal,,Compiler,6.10.1,fixed,,,Linux,x86_64 (amd64),,Unknown,simplCore/should_compiler/T3118,,,