From 7cc91cc7554d506a82a3333e66c11ae102849095 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 26 Feb 2016 13:15:08 +0100
Subject: [PATCH] Don't use "p" and "p++" in the same statement in wxOSX OpenGL
 code

This results in unspecified behaviour.

See #16909.
---
 src/osx/cocoa/glcanvas.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/osx/cocoa/glcanvas.mm b/src/osx/cocoa/glcanvas.mm
index 1490dbaff8..7afbc6c39e 100644
--- a/src/osx/cocoa/glcanvas.mm
+++ b/src/osx/cocoa/glcanvas.mm
@@ -90,7 +90,10 @@ WXGLPixelFormat WXGLChoosePixelFormat(const int *GLAttrs,
     {
         n1--; // skip the ending '0'
         while ( p < n1 )
-            data[p++] = (NSOpenGLPixelFormatAttribute) GLAttrs[p];
+        {
+            data[p] = (NSOpenGLPixelFormatAttribute) GLAttrs[p];
+            p++;
+        }
     }
 
     if ( ctxAttrs && n2 > 1 )