glx: Ignore DRI2 event for drawables we've destroyed

Since we now actually destroy GLX drawables, we get into situations where
we get events for drawables that no longer exist.  Just ignore the
event in that case.

diff --git a/src/glx/dri2.c b/src/glx/dri2.c
index d4108986489fad1137ad901b6371d93b93589f3e..30999c899a7e32a48d8d3b04e279cd3ea82a23f2 100644 (file)
--- a/src/glx/dri2.c
+++ b/src/glx/dri2.c
@@ -103,7 +103,7 @@ DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire)
 
       /* Ignore swap events if we're not looking for them */
       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, awire->drawable);
-      if (!(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
+      if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
         return False;
 
       aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);