#13434: hs_try_putmvar003 is timing out / segfaulting -------------------------------------+------------------------------------- Reporter: ezyang | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: 13722 Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): jared-w seems to be seeing this reproducibly on his machine. We haven't yet determined what it is about his setup that makes this so, but he uses Arch Linux machine on a dual-core machine. `+RTS -Ds` says the following before hanging, {{{ ... 7ff838ff9700: cap 0: schedule() 7ff838ff9700: giving up capability 0 7ff838ff9700: passing capability 0 to worker 0x7ff8397fa700 7ff8397fa700: resuming capability 0 7ff8397fa700: cap 0: running thread 515 (ThreadRunGHC) 7ff8397fa700: cap 0: thread 515 stopped (blocked on an MVar) thread 515 @ 0x4200369d98 is blocked on an MVar @ 0x420003c798 (TSO_DIRTY) 7ff8397fa700: giving up capability 0 7ff8397fa700: freeing capability 0 7ff894ff9700: cap 0: waking up thread 515 on cap 0 7ff894ff9700: passing capability 0 to worker 0x7ff8397fa700 7ff8397fa700: woken up on capability 0 7ff8397fa700: resuming capability 0 7ff8397fa700: cap 0: running thread 515 (ThreadRunGHC) 7ff8397fa700: cap 0: waking up thread 117 on cap 0 7ff8397fa700: cap 0: thread 515 stopped (finished) 7ff8397fa700: cap 0: running thread 117 (ThreadRunGHC) 7ff8397fa700: cap 0: thread 117 stopped (suspended while making a foreign call) 7ff8397fa700: freeing capability 0 7ff8b718b700: returning; I want capability 0 7ff8b718b700: resuming capability 0 7ff8b718b700: cap 0: running thread 3 (ThreadRunGHC) 7ff8b718b700: cap 0: thread 3 stopped (yielding) 7ff8b718b700: cap 0: running thread 3 (ThreadRunGHC) 7ff8b718b700: cap 0: thread 3 stopped (suspended while making a foreign call) 7ff8b718b700: passing capability 0 to worker 0x7ff838ff9700 7ff838ff9700: woken up on capability 0 7ff838ff9700: resuming capability 0 7ff838ff9700: deadlocked, forcing major GC... 7ff838ff9700: cap 0: requesting parallel GC 7ff838ff9700: 0 idle caps all threads: threads on capability 0: other threads: thread 117 @ 0x4200368920 is blocked on an external call (TSO_DIRTY) thread 116 @ 0x42002c6b58 is blocked on an external call (TSO_DIRTY) thread 115 @ 0x42003f0d88 is blocked on an external call thread 114 @ 0x42003fc858 is blocked on an external call (TSO_DIRTY) thread 24 @ 0x4200361e28 is blocked on an external call (TSO_DIRTY) thread 23 @ 0x42003ebdb0 is blocked on an external call (TSO_DIRTY) thread 22 @ 0x42003d5858 is blocked on an external call (TSO_DIRTY) thread 21 @ 0x42003d1400 is blocked on an external call (TSO_DIRTY) thread 20 @ 0x42003e1400 is blocked on an external call (TSO_DIRTY) thread 19 @ 0x42003d2858 is blocked on an external call thread 18 @ 0x42003a40a0 is blocked on an external call thread 17 @ 0x4200397a88 is blocked on an external call (TSO_DIRTY) thread 16 @ 0x42003bcec8 is blocked on an external call (TSO_DIRTY) thread 15 @ 0x4200393f28 is blocked on an external call (TSO_DIRTY) thread 14 @ 0x420039d9e8 is blocked on an external call (TSO_DIRTY) thread 5 @ 0x42003744c8 is blocked on an external call (TSO_DIRTY) thread 4 @ 0x420036e358 is blocked on an MVar @ 0x420036da10 thread 3 @ 0x42002ba0f0 ["TimerManager"] is blocked on an external call (TSO_DIRTY) thread 2 @ 0x42002ba168 ["IOManager on cap 0"] is blocked on an external call 7ff838ff9700: cap 0: starting GC 7ff838ff9700: cap 0: GC working 7ff838ff9700: cap 0: GC idle 7ff838ff9700: cap 0: GC done 7ff838ff9700: cap 0: GC idle 7ff838ff9700: cap 0: GC done 7ff838ff9700: cap 0: GC idle 7ff838ff9700: cap 0: GC done 7ff838ff9700: cap 0: all caps stopped for GC 7ff838ff9700: cap 0: finished GC 7ff838ff9700: giving up capability 0 7ff838ff9700: freeing capability 0 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13434#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler