the fosphorSupport module does not let the GUI start

[akoun]

PothosGui crashes with the following message

Exception: Assertion violation: _readfd != -1 in file "/build/poco-HOje2L/poco-1.7.8.2/Foundation/src/PipeImpl_POSIX.cpp", line 66

the presence of
/usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so
seems to be at the source of it, since removing it permits the GUI to start

PS: under Debian stretch with MyriadRF and pothosware-support/framework PPA's enabled for zesty

[guruofquality]

I wonder if the fosphor code is doing something like gui/window initialization that conflicts with how Qt is used in PothosGUI. I also wonder if it has something to do with Qt4 being used for fosphor (I think) and Qt5 for PothosGui. Just a guess:

Curious if this works from the command line:
PothosUtil --load-module=/usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so

It also might be interesting to:
gdb PothosGui run, and see where the crash is.

[akoun]

OK here it goes:
$ PothosUtil --load-module=/usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so
Loading: /usr/local/lib/Pothos/modules0.5/gnuradio/libfosphorSupport.so
success!

$ gdb PothosGui
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Type "apropos word" to search for commands related to "word"...
Reading symbols from PothosGui...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/PothosGui
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffed512700 (LWP 18090)]
[New Thread 0x7fffecd11700 (LWP 18091)]
[New Thread 0x7fffe4d17700 (LWP 18092)]
[New Thread 0x7fffda41d700 (LWP 18093)]
[New Thread 0x7fffd9ad1700 (LWP 18094)]
[Thread 0x7fffd9ad1700 (LWP 18094) exited]
--> here it shows the assertion error window. I click OK and
[Thread 0x7fffe4d17700 (LWP 18092) exited]
[Thread 0x7fffed512700 (LWP 18090) exited]
[Thread 0x7fffecd11700 (LWP 18091) exited]
[Thread 0x7fffda41d700 (LWP 18093) exited]
[Inferior 1 (process 18082) exited with code 01]
(gdb)