[Pkg-electronics-devel] Bug#948626: kicad: Closing pcbnew hangs main kicad process

[Paul "LeoNerd" Evans]

On Sat, 11 Jan 2020 14:26:12 +0100
Bernhard Übelacker <bernhardu at mailbox.org> wrote:

> Could you recheck - could it be that this pid 309563
> was still running from a previous kicad session and
> your hanging kicad was another, newer process?

Definitely a new one. To retest:

  $ pgrep kicad
  [nothing]

  [run kicad, get it stuck]

  $ pgrep kicad
  493905

Just a single one running.

  (gdb) bt
  #0  0x00007faf28a244bc in wxClassInfo::~wxClassInfo() ()
      at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
  #1  0x00007faf2837c720 in __run_exit_handlers
      (status=0, listp=0x7faf284f9718 <__exit_funcs>, run_list_atexit=run_list_atexit at entry=true, run_dtors=run_dtors at entry=true) at exit.c:108
  #2  0x00007faf2837c85a in __GI_exit (status=<optimized out>) at exit.c:139
  #3  0x00007faf28366bc2 in __libc_start_main (main=
      0x56538577f880, argc=1, argv=0x7fff267a6058, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff267a6048)
      at ../csu/libc-start.c:342
  #4  0x000056538578412a in _start ()

To clarify, this was after simply clicking the windomanager [X] button
to close the pcbnew window; I was intending to leave the toplevel kicad
window still open.

> Because, I guess, the __run_exit_handlers should just
> run at process exit.
> 
> The last line in your backtrace point to this line,
> with a loop which would fit into the picture:
>   https://sources.debian.org/src/wxwidgets3.0/3.0.4+dfsg-15/src/common/object.cpp/#L177
> 
> When you are in gdb and try to leave the current function
> by "finish", do you get again to the debugger prompt,
> or is it causing already the 100% CPU usage again?

I'll try:

  (gdb) finish
  Run till exit from #0  0x00007faf28a244bc in wxClassInfo::~wxClassInfo() ()
     from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0

That returns to 100% CPU spin which I believe it'll continue on until
SIGTERM.

-- 
Paul "LeoNerd" Evans

leonerd at leonerd.org.uk      |  https://metacpan.org/author/PEVANS
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