Oops last time I checked I hadn't cherry-picked the #9078 fix. Retested with that and it still segfaults.
Unfortunately we haven't found a smaller test case yet. We've been using Vagrant for repeatable test runs for GHCJS in the past. Would a Vagrant script for reproducing the crash be ok? luite On Thu, May 29, 2014 at 10:19 AM, Simon Marlow <[email protected]> wrote: > Please record the repro steps exactly, including the git hashes of any > repositories that you use. If it is a GC bug, the last thing we want is > for it to disappear, because then we lose the opportunity to find it. > > If you could put the build steps into a script that we can run to > reproduce the error, that will help too. And as Edward says, if there's > any way you can find to reduce the test case so that it still fails, that's > really useful. > > Cheers, > Simon > > > On 28/05/2014 11:04, Ömer Sinan Ağacan wrote: > >> Hi all, >> >> I'm suffering from a RTS bug(probably GC related) that makes making >> progress in my GSoC project impossible. I have very limited knowledge >> of GHC internals and I currently have no idea how to produce a minimal >> program that demonstrates the bug. I wrote how to reproduce it and gdb >> backtrace when segfault happens in a short blog post: >> http://osa1.net/posts/2014-05-27-worst-bug.html . As also written in >> the blog post, changing generation count of generational GC will makes >> the bug disappear in some cases, but it's not a solution. >> >> I also pasted backtrace output below for those who don't want to click >> links. >> >> GHC version used is 7.8.2. >> >> If anyone give me some pointers to understand what's going wrong or >> how can I produce a simple program that demonstrates the bug, I'd like >> to work on that. I'm basically stuck and I can't make any progress >> with this bug. >> >> Thanks, >> Ömer >> >> [ 5 of 202] Compiling GHC.Unicode[boot] ( GHC/Unicode.hs-boot, >> dist/build/GHC/Unicode.js_p_o-boot ) >> Detaching after fork from child process 3382. >> [ 6 of 202] Compiling GHC.IO[boot] ( GHC/IO.hs-boot, >> dist/build/GHC/IO.js_p_o-boot ) >> Detaching after fork from child process 3383. >> [ 7 of 202] Compiling GHC.Exception[boot] ( GHC/Exception.lhs-boot, >> dist/build/GHC/Exception.js_p_o-boot ) >> Detaching after fork from child process 3384. >> [ 51 of 202] Compiling GHC.Fingerprint[boot] ( >> GHC/Fingerprint.hs-boot, dist/build/GHC/Fingerprint.js_p_o-boot ) >> Detaching after fork from child process 3385. >> [ 55 of 202] Compiling GHC.IO.Exception[boot] ( >> GHC/IO/Exception.hs-boot, dist/build/GHC/IO/Exception.js_p_o-boot ) >> Detaching after fork from child process 3386. >> [ 75 of 202] Compiling Foreign.C.Types ( Foreign/C/Types.hs, >> dist/build/Foreign/C/Types.js_p_o ) >> >> Program received signal SIGSEGV, Segmentation fault. >> 0x000000000425d5c4 in LOOKS_LIKE_CLOSURE_PTR (p=0x0) at >> includes/rts/storage/ClosureMacros.h:258 >> 258 includes/rts/storage/ClosureMacros.h: No such file or directory. >> (gdb) bt >> #0 0x000000000425d5c4 in LOOKS_LIKE_CLOSURE_PTR (p=0x0) at >> includes/rts/storage/ClosureMacros.h:258 >> #1 0x000000000425f776 in scavenge_mutable_list1 (bd=0x7fffe5c02a00, >> gen=0x4d1fd48) at rts/sm/Scav.c:1400 >> #2 0x000000000425fa13 in scavenge_capability_mut_Lists1 >> (cap=0x4cfe5c0 <MainCapability>) at rts/sm/Scav.c:1493 >> #3 0x0000000004256b66 in GarbageCollect (collect_gen=0, >> do_heap_census=rtsFalse, gc_type=2, >> cap=0x4cfe5c0 <MainCapability>) at rts/sm/GC.c:342 >> #4 0x00000000042454a3 in scheduleDoGC (pcap=0x7fffffffc198, >> task=0x4d32b60, force_major=rtsFalse) >> at rts/Schedule.c:1650 >> #5 0x0000000004243de4 in schedule (initialCapability=0x4cfe5c0 >> <MainCapability>, task=0x4d32b60) >> at rts/Schedule.c:553 >> #6 0x0000000004246436 in scheduleWaitThread (tso=0x7ffff6708d60, >> ret=0x0, pcap=0x7fffffffc2c0) at rts/Schedule.c:2346 >> #7 0x000000000423e9b4 in rts_evalLazyIO (cap=0x7fffffffc2c0, >> p=0x477f850, ret=0x0) at rts/RtsAPI.c:500 >> #8 0x0000000004241666 in real_main () at rts/RtsMain.c:63 >> #9 0x0000000004241759 in hs_main (argc=237, argv=0x7fffffffc448, >> main_closure=0x477f850, rts_config=...) >> at rts/RtsMain.c:114 >> #10 0x0000000000408ea7 in main () >> _______________________________________________ >> ghc-devs mailing list >> [email protected] >> http://www.haskell.org/mailman/listinfo/ghc-devs >> >> _______________________________________________ > ghc-devs mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/ghc-devs >
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