Comment 75 for bug 36581

The only asynch event is the dnotify signal. It is handled
by dnotify_signal_handler() which pushes the file descriptot number
onto a GQueue and does a write to a local pipe. The pipe is hooked
to the mainloop and pure synchronous processing should be done from
there.
There is a comment that GQueue changes is not signal safe and something
else should be used. That's the only uncertaintie I can detect in the
code, assuming there is only the main application thread running. The
fact that the problem seems to occur frequently on your fast SMP box
makes me wonder if there isn't something which still generate some
kind of reentrancy.
What puzzles me is that even if the node children list was modified
during gam_tree_get_children() the list might get duplicate or wrong
data pointers, but the l->next pointers should still be correct...

Daniel