Heinrich Fink authored Nov 18, 2015 and Sebastian Dröge committed Nov 18, 2015

After polling for file descriptors, the Cocoa select thread did wake up
the main run loop instance that has been stored in a static variable.
This variable might have already been set to NULL by
g_main_context_release, resulting in a segfault of CFRunLoopWakeUp. This
race is fixed by this commit by simply not storing the main run loop in
a variable, but instead calling CFRunLoopGetMain locally where needed.
Within a single process, the main run loop is always the same, and
always accessible. It is therefore not necessary anyway to remember the
run loop instance when acquiring the context.

https://bugzilla.gnome.org/show_bug.cgi?id=758285