#15449: Nondeterministic Failure on aarch64 with -jn, n > 1 -------------------------------------+------------------------------------- Reporter: tmobile | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 Resolution: | Keywords: Operating System: Linux | Architecture: aarch64 Type of failure: Compile-time | Test Case: crash or panic | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Quite alright; you had me excited that this ticket might have an easy resolution afterall. However, given that this is only failing on LLVM/AArch64 it does sound like this is likely an `-fllvm` code generation bug. Doing a careful audit of the code generator's barriers sounds like the best way forward. This is likely wrong on LLVM/x86 as well, but the bug doesn't manifest due to the architecture's strong memory model. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15449#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler