Re: segfault in RTS - can anyone help me tracking this bug down?

Hi all, Here's an update. While playing with some parameters I managed to produce a case where compilation still fails, but this time with an assertion error instead of a segfault: ... snipped ... [112 of 202] Compiling System.Posix.Types ( System/Posix/Types.hs, dist/build/System/Posix/Types.js_p_o ) ghcjs: internal error: ASSERTION FAILED: file rts/sm/Scav.c, line 1400 (GHC version 7.8.2 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Program received signal SIGABRT, Aborted. 0x00007ffff687f849 in raise () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff687f849 in raise () from /lib64/libc.so.6 #1 0x00007ffff6880cd8 in abort () from /lib64/libc.so.6 #2 0x0000000004238a27 in rtsFatalInternalErrorFn (s=0x4554e60 "ASSERTION FAILED: file %s, line %u\n", ap=0x7fffffffbe58) at rts/RtsMessages.c:170 #3 0x000000000423865f in barf (s=0x4554e60 "ASSERTION FAILED: file %s, line %u\n") at rts/RtsMessages.c:42 #4 0x00000000042386c2 in _assertFail (filename=0x4559fbd "rts/sm/Scav.c", linenum=1400) at rts/RtsMessages.c:57 #5 0x00000000042565e9 in scavenge_mutable_list1 (bd=0x7fffe7402dc0, gen=0x4d15d88) at rts/sm/Scav.c:1400 #6 0x0000000004256873 in scavenge_capability_mut_Lists1 (cap=0x4cf49c0 <MainCapability>) at rts/sm/Scav.c:1493 #7 0x000000000424d9c6 in GarbageCollect (collect_gen=0, do_heap_census=rtsFalse, gc_type=2, cap=0x4cf49c0 <MainCapability>) at rts/sm/GC.c:342 #8 0x000000000423c303 in scheduleDoGC (pcap=0x7fffffffc188, task=0x4d28ba0, force_major=rtsFalse) at rts/Schedule.c:1650 #9 0x000000000423ac44 in schedule (initialCapability=0x4cf49c0 <MainCapability>, task=0x4d28ba0) at rts/Schedule.c:553 #10 0x000000000423d296 in scheduleWaitThread (tso=0x7ffff6708d60, ret=0x0, pcap=0x7fffffffc2b0) at rts/Schedule.c:2346 #11 0x0000000004235814 in rts_evalLazyIO (cap=0x7fffffffc2b0, p=0x4776850, ret=0x0) at rts/RtsAPI.c:500 #12 0x00000000042384c6 in real_main () at rts/RtsMain.c:63 #13 0x00000000042385b9 in hs_main (argc=238, argv=0x7fffffffc438, main_closure=0x4776850, rts_config=...) at rts/RtsMain.c:114 #14 0x0000000000408ea7 in main () I'm not sure if that helps but I just wanted to share in case it helps. I'm currently trying to come up with a single file that causes this problem. --- Ömer Sinan Ağacan http://osa1.net 2014-05-29 18:50 GMT+03:00 Luite Stegeman :

On Thu, May 29, 2014 at 5:41 PM, Simon Marlow wrote:

...

Yeah, vagrant would be fine.

Do you have any FFI or other strange things in GHCJS that might conceivably cause this?

Not in GHCJS itself as far as I know, but its dependency list is rather long, unfortunately.

luite