ghc: panic! (the 'impossible' happened): Missing alternative
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.
Trac metadata
Trac field | Value |
---|---|
Version | 6.10.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
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Blocking | |
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Operating system | |
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