From 8313aaf2d2c39dd94d04766a10a0207c682790e2 Mon Sep 17 00:00:00 2001
From: fvogel <fvogelnew1@free.fr>
Date: Sat, 7 Jan 2017 15:49:04 +0000
Subject: Patch from chw for [7a838c38a1]: X11 bind event ring buffer and
 GraphicsExpose/NoExpose

---
 generic/tkBind.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/generic/tkBind.c b/generic/tkBind.c
index d3fdc96..525e13e 100644
--- a/generic/tkBind.c
+++ b/generic/tkBind.c
@@ -1260,6 +1260,16 @@ Tk_BindEvent(
 	}
     }
 
+    /*
+     * Ignore event types which are not in flagArray. Most notably,
+     * NoExpose events can fill the ring buffer and disturb (thus
+     * masking out) event sequences of interest.
+     */
+
+    if ((eventPtr->type >= TK_LASTEVENT) || !flagArray[eventPtr->type]) {
+       return;
+    }
+
     dispPtr = ((TkWindow *) tkwin)->dispPtr;
     bindInfoPtr = winPtr->mainPtr->bindInfo;
 
-- 
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