Bug#886154: more stack trace

[Simon McVittie]

On Tue, 02 Jan 2018 at 18:42:00 +0000, Kjö Hansi Glaz wrote:
> Actually there are two crashes, which you can find below:
> 
> $ coredumpctl | tee
> TIME                            PID   UID   GID SIG COREFILE  EXE
> Tue 2018-01-02 19:18:33 CET    2042  1000  1000   6 present
> /usr/bin/Xwayland
> Tue 2018-01-02 19:18:33 CET    1981  1000  1000  11 present
> /usr/bin/gnome-shell

One of these probably causes the other - it'll be a bug in the error
handing code paths of either Xwayland or gnome-shell.

> #1  0x00007fe7b7c65278 in st_label_set_text (label=0x558a749ee890
> [StLabel], text=0x558a772bcf90 "76") at ../src/st/st-label.c:331

Does the text "76" mean anything to you? Perhaps it's a battery level or
the name of a wireless network near you or something? That would narrow
it down a bit... it's hard to tell what caused a crash like this where
most of the stack is "interpret JavaScript".

> #23 0x00007fe7b13f1040 in js::jit::InvokeFunctionInfo () at
> /usr/lib/x86_64-linux-gnu/libmozjs-52.so.0

libmozjs-52-0-dbgsym would provide more information about this part of
the stack, although it probably isn't particularly interesting.

"thread apply all bt" might also be interesting: that'll tell us which
threads were active and which were just waiting.

> #0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
> #1  0x00007f080f05e19a in __GI_abort () at abort.c:89
> #2  0x00005561bc7418ba in OsAbort ()
> #3  0x00005561bc7473d3 in ?? ()
> #4  0x00005561bc7481f5 in FatalError ()
> #5  0x00005561bc5cf84f in ?? ()
> #6  0x00005561bc73f371 in ?? ()
> #7  0x00005561bc73835b in WaitForSomething ()
> #8  0x00005561bc704193 in ?? ()
> #9  0x00005561bc708410 in ?? ()
> #10 0x00007f080f049561 in __libc_start_main (main=0x5561bc5cee60,
> argc=11, argv=0x7ffe218ae768, init=<optimized out>,
>     fini=<optimized out>, rtld_fini=<optimized out>,
> stack_end=0x7ffe218ae758) at ../csu/libc-start.c:297

I think this is also missing some debug symbols, but I can't tell
which ones; perhaps xwayland-dbgsym if you don't already have that.

    smcv