#5303: GHC crash (panic) with -O2 and nonexistent .hi
-------------------------+--------------------------------------------------
Reporter: mornfall | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.3 | Keywords:
Testcase: | Blockedby:
Os: Linux | Blocking:
Architecture: x86 | Failure: Compile-time crash
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14:13:47 | morn@ald:~/dev/darcs/prims-v3 -> ghc test.hs
[1 of 1] Compiling Test ( test.hs, test.o )
14:13:51 | morn@ald:~/dev/darcs/prims-v3 -> ghc -O2 test.hs
14:13:52 | morn@ald:~/dev/darcs/prims-v3 -> rm test.{hi,o}
14:14:03 | morn@ald:~/dev/darcs/prims-v3 -> ghc -O2 test.hs
[1 of 1] Compiling Test ( test.hs, test.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.0.3 for i386-unknown-linux):
funResultTy
<pred>main:Test.ApplyState{tc rrv} p{tv aBn} [sk]
~
hashed-storage-0.5.7:Storage.Hashed.Tree.Tree{tc r4Y}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
I am attaching the test.hs that causes this. It needs hashed-storage and
mtl from hackage to build, but otherwise it should be fairly minimal. I
suppose I could cut it down further to only need mtl, but I already spent
an hour tracking this down instead of getting work done. If you do need a
further cutdown, let me know though, and I can try.
14:12:26 | morn@ald:~ -> ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.0.3
(GHC installed from Debian packages)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5303>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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