#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 tmobile): Attaching GDB to a hung GHC, looks like it's just stuck on a futex: {{{ #0 0x0000007fa5459100 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x60939c) at ../sysdeps/unix/sysv/linux/futex- internal.h:88 #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x6093a0, cond=0x609370) at pthread_cond_wait.c:502 #2 __pthread_cond_wait (cond=0x609370, mutex=0x6093a0) at pthread_cond_wait.c:655 #3 0x0000007fa56815e8 in waitCondition () from /nix/store /dcwj7hvxgzqj7kbmfklqh4kg635ra7pk-ghc-8.4.3-binary-aarch64/lib/aarch64 -unknown-linux-gnu-ghc-8.4.3/bin/../rts/libHSrts_thr-ghc8.4.3.so Backtrace stopped: previous frame identical to this frame (corrupt stack?) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15449#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler