Segfault on break

[wildart]

I tried to cancel script executed from command line and got a segfault.

^Cerror in running finalizer: <?::
signal (11): Segmentation fault
jl_static_show at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
jl_static_show at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
jl_static_show at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
jl_static_show at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
unknown function (ip: -763893982)
unknown function (ip: -763890736)
uv_atexit_hook at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
jl_exit at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
unknown function (ip: -763959987)
unknown function (ip: -767278272)
jl_gc_collect at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
allocobj at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
jl_alloc_array_1d at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
distance_to_manifold at /home/art/.julia/v0.3/LMCLUS/src/LMCLUS.jl:413
find_separation at /home/art/.julia/v0.3/LMCLUS/src/LMCLUS.jl:309
find_best_separation at /home/art/.julia/v0.3/LMCLUS/src/LMCLUS.jl:262
find_manifold at /home/art/.julia/v0.3/LMCLUS/src/LMCLUS.jl:129
lmclus at /home/art/.julia/v0.3/LMCLUS/src/LMCLUS.jl:67
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
anonymous at no file:88
unknown function (ip: -763914996)
unknown function (ip: -763912499)
jl_load at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
include at ./boot.jl:245
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
include_from_node1 at loading.jl:128
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
process_options at ./client.jl:285
_start at ./client.jl:354
jlcall__start_17182 at /usr/bin/../lib/x86_64-linux-gnu/julia/sys.so (unknown line)
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
unknown function (ip: 4200623)
julia_trampoline at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
unknown function (ip: 4199613)
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 4199667)
unknown function (ip: 0)
Segmentation fault (core dumped)

Julia Version 0.3.8
Commit 79599ad (2015-04-30 23:40 UTC)
Platform Info:
  System: Linux (x86_64-linux-gnu)
  CPU: Intel(R) Core(TM) i5-2467M CPU @ 1.60GHz
  WORD_SIZE: 64
  BLAS: libopenblas (NO_LAPACK NO_LAPACKE DYNAMIC_ARCH NO_AFFINITY Sandybridge)
  LAPACK: liblapack.so.3
  LIBM: libopenlibm
  LLVM: libLLVM-3.3

[ScottPJones]

I've run into this as well (yesterday, on Mac OS X)

[yuyichao]

This seems to happen all the time and I think it is related/the same with #1468 and/or #5399

[stevengj]

The only reasonable solution is to disable sigint in every ccall (#2622), I think. This is mainly just waiting for someone to implement it.

[JeffBezanson]

👎. Doing something to every ccall is just way too heavy-handed. Also I don't think it would fix this issue. I think the problem is that exit_on_sigint ignores the signal-deferring mechanism:

void sigint_handler(int sig, siginfo_t *info, void *context)
{
    if (exit_on_sigint) jl_exit(0);
    if (jl_defer_signal) {
        jl_signal_pending = sig;

[JeffBezanson]

@wildart see if that helps.

[wildart]

Sorry, I could not reproduce it neither before nor after. These faults happened sometimes in 0.3.x, but 0.4 experience is more stable.