From 9f6689d44770e6384a645a7be520bf7d8a9de2b6 Mon Sep 17 00:00:00 2001
From: nyamatongwe <devnull@localhost>
Date: Wed, 5 Sep 2012 08:40:49 +1000
Subject: Fix crashes on Ubuntu with GTK+3 where scroll bar changes invalidate
 the drawing surface.

---
 gtk/ScintillaGTK.cxx | 4 ++++
 src/Editor.cxx       | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/gtk/ScintillaGTK.cxx b/gtk/ScintillaGTK.cxx
index be007e775..8a09b105b 100644
--- a/gtk/ScintillaGTK.cxx
+++ b/gtk/ScintillaGTK.cxx
@@ -1213,6 +1213,10 @@ bool ScintillaGTK::ModifyScrollBars(int nMax, int nPage) {
 		modified = true;
 	}
 #endif
+	if (modified && (paintState == painting)) {
+		paintState = paintAbandoned;
+	}
+
 	return modified;
 }
 
diff --git a/src/Editor.cxx b/src/Editor.cxx
index fea5a2336..2b2b1785d 100644
--- a/src/Editor.cxx
+++ b/src/Editor.cxx
@@ -3438,6 +3438,8 @@ void Editor::Paint(Surface *surfaceWindow, PRectangle rcArea) {
 	AllocateGraphics();
 
 	RefreshStyleData();
+	if (paintState == paintAbandoned)
+		return;	// Scroll bars may have changed so need redraw
 	RefreshPixMaps(surfaceWindow);
 
 	StyleToPositionInView(PositionAfterArea(rcArea));
-- 
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