#8834: 64-bit windows cabal.exe segfaults in GC ----------------------------------+---------------------------------- Reporter: awson | Owner: Type: bug | Status: patch Priority: highest | Milestone: 7.8.1 Component: Compiler | Version: 7.8.1-rc2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: ----------------------------------+---------------------------------- Comment (by jstolarek): Replying to [comment:12 awson]:
@simonmar, unreverting `isTrivial` brokes things again.
So this works: {{{ isTrivial :: CmmExpr -> Bool isTrivial (CmmReg _) = True isTrivial _ = False }}} but this doesn't: {{{ isTrivial :: CmmExpr -> Bool isTrivial (CmmReg (CmmLocal _)) = True isTrivial _ = False }}} ? I know this is slightly different from your patch (it ignores literals which I believe are irrelevant here). Again, would be nice to see differences in Cmm between the two. simonmar: could you tell us whether the call to `newCAF` clobbers `R1` ? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8834#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler