freezes on OSX

[Jonatan Liljedahl]

Testing kicad-20160928-222523.904ae20-c4osx to try out the new simulator, but it freezes every now and then. Force quit required. Not sure exactly what triggers the freeze, seems to happen randomly after a couple of minutes. Once it froze when I tried to save, another while editing the schema, and now by just sitting idle in the background while I was writing this bug report.

[Jonatan Liljedahl (kymatica)]

Some investigations: when running kicad under lldb it does not freeze, but shows a wxWidgets Debug Alert (see attached). Clicking Yes to stop the program does not reveal anything useful in the backtrace, it simply stops in kill called by libwx_osx_cocoau_core-3.0.0.dylib`wxGUIAppTraitsBase::ShowAssertDialog(wxString const&)..

[Jonatan Liljedahl (kymatica)]

Ok, after playing around a bit more I managed to get a freeze while running in lldb. I was trying to start the simulation (which worked fine many times before) after assigning the generic opamp spice model from the simulator demos.

```
* thread #1: tid = 0x1e6956, 0x00007fff98b76f8a libsystem_kernel.dylib`__read_nocancel + 10, stop reason = signal SIGSTOP
  * frame #0: 0x00007fff98b76f8a libsystem_kernel.dylib`__read_nocancel + 10
    frame #1: 0x00007fff9e96c155 libsystem_c.dylib`_sread + 16
    frame #2: 0x00007fff9e96b769 libsystem_c.dylib`__srefill1 + 24
    frame #3: 0x00007fff9e964a60 libsystem_c.dylib`fgets + 106
    frame #4: 0x000000010c5e8beb libngspice.0.dylib`promptreturn + 109
    frame #5: 0x000000010c5e8d5b libngspice.0.dylib`out_send + 237
    frame #6: 0x000000010c5e8e04 libngspice.0.dylib`out_vprintf + 38
    frame #7: 0x000000010c5e8eb4 libngspice.0.dylib`out_printf + 148
    frame #8: 0x000000010c5c29a2 libngspice.0.dylib`inp_dodeck + 1063
    frame #9: 0x000000010c5c210b libngspice.0.dylib`inp_spsource + 4852
    frame #10: 0x000000010c5c3549 libngspice.0.dylib`create_circbyline + 223
    frame #11: 0x000000010c5a9387 libngspice.0.dylib`ngSpice_Circ + 93
    frame #12: 0x000000010be478b8 _eeschema.kiface`NGSPICE::LoadNetlist(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) + 3032
    frame #13: 0x000000010be257f2 _eeschema.kiface`SIM_PLOT_FRAME::StartSimulation() + 1170
```

doing a continue in lldb it would continue to run again.

[Jonatan Liljedahl (kymatica)]

And another time:

```
* thread #1: tid = 0x1e6956, 0x00007fff98b76f8a libsystem_kernel.dylib`__read_nocancel + 10, stop reason = signal SIGSTOP
  * frame #0: 0x00007fff98b76f8a libsystem_kernel.dylib`__read_nocancel + 10
    frame #1: 0x00007fff9e96c155 libsystem_c.dylib`_sread + 16
    frame #2: 0x00007fff9e96b769 libsystem_c.dylib`__srefill1 + 24
    frame #3: 0x00007fff9e964a60 libsystem_c.dylib`fgets + 106
    frame #4: 0x000000010c5e8beb libngspice.0.dylib`promptreturn + 109
    frame #5: 0x000000010c5e8d5b libngspice.0.dylib`out_send + 237
    frame #6: 0x000000010c5e8e04 libngspice.0.dylib`out_vprintf + 38
    frame #7: 0x000000010c5e8eb4 libngspice.0.dylib`out_printf + 148
    frame #8: 0x000000010c5c29a2 libngspice.0.dylib`inp_dodeck + 1063
    frame #9: 0x000000010c5b6066 libngspice.0.dylib`doblock + 911
    frame #10: 0x000000010c5b59b1 libngspice.0.dylib`cp_evloop + 1972
    frame #11: 0x000000010c5a925b libngspice.0.dylib`runc + 422
    frame #12: 0x000000010c5a908b libngspice.0.dylib`ngSpice_Command + 63
    frame #13: 0x000000010be47f3e _eeschema.kiface`NGSPICE::Command(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) + 238
    frame #14: 0x000000010be44510 _eeschema.kiface`NGSPICE::Init() + 176
    frame #15: 0x000000010be217c8 _eeschema.kiface`SIM_PLOT_FRAME::SIM_PLOT_FRAME(KIWAY*, wxWindow*) + 1704
    frame #16: 0x000000010be24fc5 _eeschema.kiface`SIM_PLOT_FRAME::SIM_PLOT_FRAME(KIWAY*, wxWindow*) + 37
    frame #17: 0x000000010bc7cb8a _eeschema.kiface`SCH::IFACE::CreateWindow(wxWindow*, int, KIWAY*, int) + 378
    frame #18: 0x00000001000a497d kicad`KIWAY::Player(FRAME_T, bool, KIWAY_PLAYER*) + 541
    frame #19: 0x000000010be19303 _eeschema.kiface`SCH_EDIT_FRAME::OnSimulate(wxCommandEvent&) + 67
```

[Jonatan Liljedahl (kymatica)]

Are there any kicad developers on OSX that might have a look at this? It makes it quite frustrating to test it..

[Maciej Suminski (orsonmmz)]

Hi Jonatan,

This is much more helpful, thank you. Where have you obtained libngspice library?

[Jonatan Liljedahl (kymatica)]

As far as I can see, it was bundled with KiCad:

(lldb) image list
...
[291] 0E2AFABD-30BD-36D5-969E-8D7A3249A272 0x000000010be78000 /Applications/Kicad/kicad.app/Contents/Frameworks/libngspice.0.dylib
...

[Jonatan Liljedahl (kymatica)]

Seems to be fixed in kicad-20161002-030037.278ee7d-c4osx.dmg