Hi, Can you also install the debug packages [1] and use "bt full" command in gdb? The debug packages are needed for libgtk-3, libglib-2.0, mate-panel.
This will show function names, line numbers, variable values and other useful info to determine where and why the crash happens. [1] https://wiki.debian.org/HowToGetABacktrace#Installing_the_debugging_symbols
