#10860: setnumcapabilities001: internal error: ASSERTION FAILED: file rts/Schedule.c, line 400 -------------------------------------+------------------------------------- Reporter: thomie | Owner: simonmar Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: Runtime System | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by thomie): * cc: simonmar (added) Comment: I can reproduce two different assert failures quite reliably. The output of `+RTS -Ds` is attached. Below are the stack traces from gdb. To reproduce: {{{ $ ../../../../inplace/bin/ghc-stage2 -threaded -debug setnumcapabilities001.hs -fforce-recomp $ gdb setnumcapabilities001 (gdb) run 4 8 2000 +RTS -Ds > stdout 2> stderr & }}} Retry the `run` command multiple times, and keep the cpu busy by running for example `ghc -e [0..] > /dev/null` in a separate terminal. Another way to reproduce the assert failures is to run: {{{ $ for i in `seq 1 100`; do echo ok && ./setnumcapabilities001 100 8 2000 +RTS -Ds 2> out || break ; done }}} == Assert failure in the Garbage Colletor == {{{ Program received signal SIGABRT, Aborted. [Switching to Thread 0x7fffe6ffd700 (LWP 4419)] 0x00007ffff6ea7cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); bt #0 0x00007ffff6ea7cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007ffff6eab0d8 in __GI_abort () at abort.c:89 #2 0x000000000078c912 in rtsFatalInternalErrorFn (s=0x80a160 "ASSERTION FAILED: file %s, line %u\n", ap=0x7fffe6ffcc68) at rts/RtsMessages.c:182 #3 0x000000000078c54a in barf (s=0x80a160 "ASSERTION FAILED: file %s, line %u\n") at rts/RtsMessages.c:46 #4 0x000000000078c5ad in _assertFail (filename=0x80e9d0 "rts/sm/GC.c", linenum=904) at rts/RtsMessages.c:61 #5 0x00000000007a314b in dec_running () at rts/sm/GC.c:904 #6 0x00000000007a32ec in scavenge_until_all_done () at rts/sm/GC.c:977 #7 0x00000000007a3431 in gcWorkerThread (cap=0x7fffec0214d0) at rts/sm/GC.c:1035 #8 0x0000000000787020 in yieldCapability (pCap=0x7fffe6ffce30, task=0x7fffec035680, gcAllowed=rtsTrue) at rts/Capability.c:708 #9 0x000000000078ee7a in scheduleYield (pcap=0x7fffe6ffce68, task=0x7fffec035680) at rts/Schedule.c:674 #10 0x000000000078e3dd in schedule (initialCapability=0x7fffec0214d0, task=0x7fffec035680) at rts/Schedule.c:298 #11 0x00000000007914a2 in scheduleWorker (cap=0x7fffec0214d0, task=0x7fffec035680) at rts/Schedule.c:2378 #12 0x000000000079a3f0 in workerStart (task=0x7fffec035680) at rts/Task.c:437 #13 0x00007ffff723e182 in start_thread (arg=0x7fffe6ffd700) at pthread_create.c:312 #14 0x00007ffff6f6b47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 }}} == Assert failure in the Scheduler == {{{ Program received signal SIGABRT, Aborted. [Switching to Thread 0x7fffe77fe700 (LWP 4394)] 0x00007ffff6ea7cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); bt #0 0x00007ffff6ea7cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007ffff6eab0d8 in __GI_abort () at abort.c:89 #2 0x000000000078c912 in rtsFatalInternalErrorFn (s=0x80a160 "ASSERTION FAILED: file %s, line %u\n", ap=0x7fffe77fdd58) at rts/RtsMessages.c:182 #3 0x000000000078c54a in barf (s=0x80a160 "ASSERTION FAILED: file %s, line %u\n") at rts/RtsMessages.c:46 #4 0x000000000078c5ad in _assertFail (filename=0x80a529 "rts/Schedule.c", linenum=400) at rts/RtsMessages.c:61 #5 0x000000000078e5ef in schedule (initialCapability=0x7fffec0214d0, task=0x7fffe0000910) at rts/Schedule.c:400 #6 0x00000000007914a2 in scheduleWorker (cap=0x7fffec0214d0, task=0x7fffe0000910) at rts/Schedule.c:2378 #7 0x000000000079a3f0 in workerStart (task=0x7fffe0000910) at rts/Task.c:437 #8 0x00007ffff723e182 in start_thread (arg=0x7fffe77fe700) at pthread_create.c:312 #9 0x00007ffff6f6b47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10860#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler