lyx crash on latex export

[Neal Becker]

I get a repeatable crash on latex export.  Quite unfortunate since
that's the only way to debug latex errors.

Error: Software exception Detected
----------------------------------------
LyX has caught an exception, it will now attempt to save all unsaved
documents and exit.

Exception: std::exception
Buffer.cpp (1601):   /home/nbecker/itri_sls/vtc2020.lyx.emergency
KCrash: Application 'lyx' crashing...
KCrash: Attempting to start /usr/libexec/drkonqi from kdeinit
sock_file=/run/user/1000/kdeinit5__0