Valgrind: conditional jump or move depends on uninitalized value(s)

This report is from opening LyX, starting a new document, and quitting. How can I read it to know if it's LyX's fault or not? Specifically, how can I know whether the uninitialised value is created inside QPainter::drawPixmap() or if it's instead in lyx::frontend::(anonymous namespace)::BackgroundW

valgrind: points to unaddressable byte(s)

When I export the English Welcome.lyx on the command line with the following command: lyx -e default Welcome.lyx I get the following output: ==8181== Syscall param waitid(infop) points to unaddressable byte(s) ==8181==at 0x628925D: syscall (syscall.S:38) ==8181==by 0x5B9A7A6: ??? (in