[Xcb] Assertion failed: (pthreadret == 0), function _xcb_in_wake_up_next_reader, file xcb_in.c, line 926.

[Bart Massey]

I wrote "Thanks much for the issue report?" I of course meant "Thanks much
for the issue report!" Apologies.

On Thu, Apr 16, 2020 at 11:14 AM Bart Massey <bart at cs.pdx.edu> wrote:

> Thanks much for the issue report? If you could also file this issue here
> https://gitlab.freedesktop.org/xorg/lib/libxcb/-/issues that would be
> great.
>
> I'm not sure what's going on with your issue: it appears that the
> connection object is invalid at the time XPutImage() is called. Perhaps
> the problem is related to
> https://gitlab.freedesktop.org/xorg/lib/libxcb/-/issues/46 ?
>
> I'm probably not going to have time to try to track this down super-soon.
> Hopefully someone else here can reproduce it.
>
> On Thu, Apr 16, 2020 at 8:11 AM Luigi Salvatore Esposito <
> luigi.salvatore.esposito at cern.ch> wrote:
>
>> Dear XCB developers,
>>
>> following the upgrade to libxcb 1.14, we have now a crash in one of our
>> tools (http://flair.web.cern.ch/flair/)
>> with the crash report at the bottom of this email.
>> The problem appears at this line called in frame 11:
>> XPutImage(self->display, self->pixmap, self->gc, self->ximage, 0, 0, 0,
>> 0, width, height);
>>
>> Comparing with the libxcb 1.13, I managed to track down the issue to the
>> variable “total_read” defined in xcbint.h.
>> Indeed, with the attached patch the crash disappears.
>>
>> Do you have any suggestions how to fix the problem?
>>
>> For sake of completeness, libxcb is installed via MacPorts.
>> If needed, I can provide additional details.
>>
>> Thanks a lot for your help
>>
>> ——————————————————————
>> *Luigi Salvatore ESPOSITO *- CERN-EN/STI
>> Esplanade des Particules
>> CH-1211 Geneva 23
>> O +41 22 76 63419
>> ——————————————————————
>>
>>
>> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
>> 0   libsystem_kernel.dylib         0x00007fff6da8733a __pthread_kill + 10
>> 1   libsystem_pthread.dylib        0x00007fff6db43e60 pthread_kill + 430
>> 2   libsystem_c.dylib              0x00007fff6da0e808 abort + 120
>> 3   libsystem_c.dylib              0x00007fff6da0dac6 __assert_rtn + 314
>> 4   libxcb.1.dylib                 0x00000001147c7746
>> _xcb_in_wake_up_next_reader + 89
>> 5   libxcb.1.dylib                 0x00000001147c6dd6 _xcb_out_send + 125
>> 6   libxcb.1.dylib                 0x00000001147c6d3e xcb_writev + 68
>> 7   libX11.6.dylib                 0x00000001157fe8f9 _XSend + 315
>> 8   libX11.6.dylib                 0x00000001157f42c7 PutSubImage + 1924
>> 9   libX11.6.dylib                 0x00000001157f3c8b PutSubImage + 328
>> 10  libX11.6.dylib                 0x00000001157f385f XPutImage + 424
>> *11  geoviewer.so                   0x0000000115689233
>> Viewer_expose(ViewerObject*, _object*) + 163*
>> 12  org.python.python              0x000000010df3eb26
>> cfunction_call_varargs + 319
>> 13  org.python.python              0x000000010dfd6b72
>> _PyEval_EvalFrameDefault + 9050
>> 14  org.python.python              0x000000010dfddeb9
>> _PyEval_EvalCodeWithName + 2107
>> 15  org.python.python              0x000000010df3ef21
>> _PyFunction_Vectorcall + 217
>> 16  org.python.python              0x000000010df40f56 method_vectorcall
>> + 372
>> 17  org.python.python              0x000000010df3e80d PyVectorcall_Call
>> + 108
>> 18  _tkinter.cpython-38-darwin.so  0x000000010e8c0012 PythonCmd + 205
>> 19  libtcl8.6.dylib                0x000000010e8ddaee TclNRRunCallbacks
>> + 79
>> 20  libtcl8.6.dylib                0x000000010e8ded06 TclEvalEx + 1987
>> 21  libtcl8.6.dylib                0x000000010e8de53d Tcl_EvalEx + 26
>> 22  libtk8.6.dylib                 0x000000010ebff362 Tk_BindEvent + 5754
>> 23  libtk8.6.dylib                 0x000000010ec04fe9 TkBindEventProc +
>> 334
>> 24  libtk8.6.dylib                 0x000000010ec0c523 Tk_HandleEvent +
>> 997
>> 25  libtk8.6.dylib                 0x000000010ec0cc0c WindowEventProc +
>> 96
>> 26  libtcl8.6.dylib                0x000000010e985e78 Tcl_ServiceEvent +
>> 136
>> 27  libtcl8.6.dylib                0x000000010e98606d Tcl_DoOneEvent +
>> 153
>> 28  _tkinter.cpython-38-darwin.so  0x000000010e8be324
>> _tkinter_tkapp_mainloop + 342
>> 29  org.python.python              0x000000010df45d4e
>> method_vectorcall_FASTCALL + 250
>> 30  org.python.python              0x000000010dfdd2f5 call_function + 346
>> 31  org.python.python              0x000000010dfd66cd
>> _PyEval_EvalFrameDefault + 7861
>> 32  org.python.python              0x000000010dfddeb9
>> _PyEval_EvalCodeWithName + 2107
>> 33  org.python.python              0x000000010df3ef21
>> _PyFunction_Vectorcall + 217
>> 34  org.python.python              0x000000010df40e69 method_vectorcall
>> + 135
>> 35  org.python.python              0x000000010dfdd2f5 call_function + 346
>> 36  org.python.python              0x000000010dfd66f0
>> _PyEval_EvalFrameDefault + 7896
>> 37  org.python.python              0x000000010dfddeb9
>> _PyEval_EvalCodeWithName + 2107
>> 38  org.python.python              0x000000010dfd4790 PyEval_EvalCode +
>> 42
>> 39  org.python.python              0x000000010e00c57d run_eval_code_obj
>> + 102
>> 40  org.python.python              0x000000010e00b9cb run_mod + 82
>> 41  org.python.python              0x000000010e00a8a5 PyRun_FileExFlags
>> + 160
>> 42  org.python.python              0x000000010e009f89
>> PyRun_SimpleFileExFlags + 271
>> 43  org.python.python              0x000000010e021834 Py_RunMain + 1836
>> 44  org.python.python              0x000000010e021b90 pymain_main + 370
>> 45  org.python.python              0x000000010e021be5 Py_BytesMain + 42
>> 46  libdyld.dylib                  0x00007fff6d93fcc9 start + 1
>>
>> _______________________________________________
>> Xcb mailing list
>> Xcb at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/xcb
>>
>
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