#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 simonpj): So where are we on this? * Simon M says "here is the broken bit of code" (comment 35), and then says "I misread" (comment 38). Does that mean that the broken bit of code isn't broken? * If we use Karel's reversion patch (between comments 2 and 3 above) does that cure all known crashes? I confirm that it ''does'' fix my own "ghc- stage2 segfaults" problem, reported in #8870. But what about the hello- world problem in #8834, and Ganesh's new report in #8890? * If reverting the `CmmSink` change does in fact solve the problem, we should probably go ahead and revert it, and un-block the GHC 7.8 release. * But even if we do that we are still stuck with not knowing WHY it solves the problem. Perhaps the patch was fine, but it exposes a problem somewhere else? And we really want the `CmmSink` improvements. We really need someone to dig into it with GDB. Austin, can you get a Windows box on the network that exhibits the bug, so that Simon M can crank up gdb? Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8834#comment:39 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler