From 81abfdc13d2fd2f652aaed5291074526fa5bbecf Mon Sep 17 00:00:00 2001
From: Richard Kimberly Heck <rikiheck@lyx.org>
Date: Tue, 8 May 2018 02:07:47 -0400
Subject: [PATCH] Fix problem noted by Scott in bug #11125.

Need to set the Buffers for math insets, too.
---
 src/Undo.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Undo.cpp b/src/Undo.cpp
index eb7722839c..4510e25c4b 100644
--- a/src/Undo.cpp
+++ b/src/Undo.cpp
@@ -472,6 +472,7 @@ void Undo::Private::doTextUndoOrRedo(CursorData & cur, UndoElementStack & stack,
 		//LYXERR0("undo.array: " << *undo.array);
 		LBUFERR(undo.array);
 		dit.cell().swap(*undo.array);
+		dit.inset().setBuffer(buffer_);
 		delete undo.array;
 		undo.array = 0;
 	} else {