From 29a15f287f7f945e72967d1feef8584bef1c4141 Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Mon, 4 Feb 2013 11:28:31 +0000
Subject: [PATCH] fix [#34098] Crash after using Decimate or Remesh modifiers

converting a derived mesh to a mesh didnt clear its selection history, which could be invalid after applying a modifier.
---
 source/blender/blenkernel/intern/DerivedMesh.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source/blender/blenkernel/intern/DerivedMesh.c b/source/blender/blenkernel/intern/DerivedMesh.c
index 8ca6d045712..8e740075bc6 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.c
+++ b/source/blender/blenkernel/intern/DerivedMesh.c
@@ -562,6 +562,13 @@ void DM_to_mesh(DerivedMesh *dm, Mesh *me, Object *ob)
 		tmp.key = NULL;
 	}
 
+	/* Clear selection history */
+	tmp.mselect = NULL;
+	tmp.totselect = 0;
+	if (me->mselect) {
+		MEM_freeN(me->mselect);
+	}
+
 	*me = tmp;
 }