Segmentation fault on exit on Linux and osx

[marshmellow42]

Seems to be an issue with the exit routine and associated with the qt graphing code.
@holiman when you find a little time can you take a look?

[holiman]

Could do that, if I find some time. Any more info? Only when exiting, or at other times aswell ?

[marshmellow42]

Seems to only appear when sending the exit cmd from the Pm3 cli

[marshmellow42]

ubuntu error example:

user@ubuntuvm:~/master$ ./client/proxmark3 /dev/ttyACM0
ERROR: invalid serial port
proxmark3> exit
Segmentation fault (core dumped)
user@ubuntuvm:~/master$ 

[digitalentropy]

I can confirm on macOS 10.12.4 that the actual segfault appears only when exiting via the exit command. When breaking via Ctrl-C the issue does not appear.

I have also observed that I can tell when it's going to happen because when executing the client the focus will be taken away from my command window and I have to manually click back into it. Whenever things start off that way, exiting will result in a segfault. If I don't notice the focus change, then I do not get a segfault.

Edit: In retrospect I suppose this makes sense if it's a graphing issue. Most of the builds that didn't have this problem had no GUI due to QT library issues. It's certainly related.