From 5915d69eaf66cf89d5c5f24f436bc44afca24dfb Mon Sep 17 00:00:00 2001
From: Jean-Marc Lasgouttes <lasgouttes@lyx.org>
Date: Wed, 28 Aug 2019 18:21:17 +0200
Subject: [PATCH] Set buffer correctly when deleting column in math grid

This is a followup to 837bcbb0.

Fixes bug #11623.
---
 src/mathed/InsetMathGrid.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mathed/InsetMathGrid.cpp b/src/mathed/InsetMathGrid.cpp
index fe823d42e4..910450d378 100644
--- a/src/mathed/InsetMathGrid.cpp
+++ b/src/mathed/InsetMathGrid.cpp
@@ -896,6 +896,8 @@ void InsetMathGrid::delCol(col_type col)
 			tmpcellinfo.push_back(cellinfo_[i]);
 		}
 	swap(cells_, tmpcells);
+	// copying cells loses the buffer reference
+	setBuffer(*buffer_);
 	swap(cellinfo_, tmpcellinfo);
 
 	colinfo_.erase(colinfo_.begin() + col);