Debian stretch - python 3.5.3 - wxpython phoenix 3.0.3 (gtk2) dev2828 - jack1
=============================================================================
1 - At init (when creating a menu separator).
    - Try to remove all AppendSeparator() calls.
    * Seems to be fixed by replacing
        AppendSeparator()
      with
        Append(wx.ID_SEPARATOR, kind=wx.ITEM_SEPARATOR)

2 - On play (pthread_cond_wait in libjack.so). Just before setting sr and bufsize.
    * Fixed with macros Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS

3 - When destroying the interface.

4 - On start/stop button, segmentation fault related to wx.Timer.Notify().

5 - Use after free in pthread_create (from libjack.so).
    * Appears to be fixed in glibc-2.25 (2.24 actually installed on Debian stretch).

Debian stretch - python 3.5.3 - wxpython phoenix 3.0.3 (gtk2) dev2828 - portaudio
=================================================================================
1 - On stop (from Pa_AbortStream() from pyo)
    at src/engine/ad_portaudio.c:305
        err = 32767

2 - On play
    Thread 1 "python3" received signal SIGSEGV, Segmentation fault.
    0x0000555555722ce0 in PyType_IsSubtype ()
    (gdb) bt full
    #0  0x0000555555722ce0 in PyType_IsSubtype ()
    No symbol table info available.
    #1  0x00005555556bfaa2 in ?? ()
    No symbol table info available.
    #2  0x00005555556c028e in PyArg_ParseTupleAndKeywords ()
    No symbol table info available.
    #3  0x00007fffea36de8d in Server_init (self=0x555556b41540, args=0x7fffd7e84388, kwds=0x0)
        at src/engine/servermodule.c:615

OSX 10.8.5 - python 3.5.3 - wxpython phoenix 3.0.3 dev2828 - portaudio
======================================================================
1 - Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
    0   libportaudio.2.dylib          	0x0000000104ca6ffd Pa_IsStreamActive + 28
    1   _pyo.cpython-35m-darwin.so    	0x000000010494a956 Server_pa_deinit + 22
    2   _pyo.cpython-35m-darwin.so    	0x0000000104942781 Server_boot + 273