RTS gets stuck in scheduleDetectDeadlock()
Steps to reproduce:
- Compile HEAD.
- Add this line to MkId.mkDataConRep:
pprTrace "mkDataConRep" (text "wrap_body:" <+> ppr wrap_body) (return ())
- Recompile only stage1. (stage2 will fail, see next step)
- Compile any file using newly generated stage1.
GHC gets stuck, not using any CPU or RAM. The stack trace:
#0 0x00007fd56d570650 in __pause_nocancel () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000000002174e11 in awaitUserSignals () at rts/posix/Signals.c:343
#2 0x0000000002168a6a in scheduleDetectDeadlock (pcap=<synthetic pointer>, task=<optimized out>) at rts/Schedule.c:931
#3 schedule (task=0x42fa8e0, initialCapability=<optimized out>) at rts/Schedule.c:282
#4 scheduleWaitThread (tso=<optimized out>, ret=ret@entry=0x0, pcap=pcap@entry=0x7fffb90b7778) at rts/Schedule.c:2380
#5 0x0000000002187724 in rts_evalLazyIO (cap=cap@entry=0x7fffb90b7778, p=<optimized out>, ret=ret@entry=0x0) at rts/RtsAPI.c:500
#6 0x0000000002166637 in real_main () at rts/RtsMain.c:63
#7 hs_main (argc=<optimized out>, argv=<optimized out>, main_closure=<optimized out>, rts_config=...) at rts/RtsMain.c:114
#8 0x0000000000421fe4 in main ()It's basically stuck in pause() syscall.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Runtime System |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | simonmar |
| Operating system | |
| Architecture |