My PC has been randomly locking up lately, and while debugging I found an issue with my Ruby/Watir project. Each time the browser.close function is called, the following occurs in dmesg (slightly different each time):
[12614.684243] Chrome_~dThread[29941]: segfault at 0 ip 00007f17889b3992 sp 00007f1786aa0b00 error 6 in libxul.so[7f1787b6a000+519c000]
I'm not sure if this is causing my PC to lock up, however it still needs resolving. I've done some searching but I can't find anyone else with this issue. The issue also appears if I ctrl + c the script.
Error 6 is: The cause was a user-mode write resulting in no page being found., which makes sense if I've closed the browser.
I've read the answer on this page, but as libxul.so is a library it didn't help much (although offered me a better understanding of debugging segfaults!).
For those looking due to the linux/segfault tag rather than ruby/watir, browser.close is a builtin function in the Watir package.
Edit:
/usr/lib/firefox/This was actually the result of a PC hardware issue that wasn't apparent till much later.