#8834: 64-bit windows cabal.exe segfaults in GC ----------------------------------+---------------------------------- Reporter: awson | Owner: jstolarek 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 igloo): http://msdn.microsoft.com/en-us/library/6t169e9c.aspx says {{{ The registers RAX, RCX, RDX, R8, R9, R10, R11 are considered volatile and must be considered destroyed on function calls (unless otherwise safety- provable by analysis such as whole program optimization). The registers RBX, RBP, RDI, RSI, RSP, R12, R13, R14, and R15 are considered nonvolatile and must be saved and restored by a function that uses them. }}} so the saving info looks right to me. It wouldn't be too surprising if saving and restoring registers more worked around a register corruption bug. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8834#comment:65 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler