Comment 2 for bug 1009238

StacktraceTop:
 __assert_fail_base (fmt=<optimized out>, assertion=0x7f2336c36b86 "fd >= 0", file=0x7f2336c36aa0 "ply-event-loop.c", line=<optimized out>, function=<optimized out>) at assert.c:94
 __GI___assert_fail (assertion=assertion@entry=0x7f2336c36b86 "fd >= 0", file=file@entry=0x7f2336c36aa0 "ply-event-loop.c", line=line@entry=742, function=function@entry=0x7f2336c37390 "ply_event_loop_watch_fd") at assert.c:103
 ply_event_loop_watch_fd (loop=0xfdb150, fd=-1, status=status@entry=PLY_EVENT_LOOP_FD_STATUS_HAS_DATA, status_met_handler=status_met_handler@entry=0x7f2334279a30 <on_key_event>, disconnected_handler=disconnected_handler@entry=0x7f233427a430 <on_input_source_disconnected>, user_data=user_data@entry=0xfe8870) at ply-event-loop.c:742
 open_input_source (backend=0xfe8850, input_source=0xfe8870) at ./plugin.c:700
 ply_renderer_open_input_source (renderer=0xfe2940, input_source=<optimized out>) at ply-renderer.c:377