X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FInsetMathGrid.cpp;h=0a637ec715c26ae8f32d5bf4ab5f718de9d02385;hb=21c92c8a129b5f3ff56de33bf2941a25967cffbb;hp=f4e868ec83d7f0c9d5512471d17a1bee40fafdef;hpb=b84e497ab6a772a8d12e3fd6f409bf9635f2ac31;p=lyx.git

diff --git a/src/mathed/InsetMathGrid.cpp b/src/mathed/InsetMathGrid.cpp
index f4e868ec83..0a637ec715 100644
--- a/src/mathed/InsetMathGrid.cpp
+++ b/src/mathed/InsetMathGrid.cpp
@@ -1624,7 +1624,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 		} else {
 			// multiple cells
 			cur.recordUndoInset();
-			col_type startcol =  col(cur.idx());
+			col_type startcol = col(cur.idx());
 			row_type startrow = cur.row();
 			col_type oldncols = ncols();
 			col_type numcols =
@@ -1648,8 +1648,8 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 				}
 				// append columns for the left over horizontal cells
 				for (InsetMath::col_type c = numcols; c < grid.ncols(); ++c) {
-					addCol(c + 1);
-					idx_type i = index(r + startrow, c + 1);
+					addCol(c + startcol);
+					idx_type i = index(r + startrow, min(c + startcol, ncols() - 1));
 					cell(i).append(grid.cell(grid.index(r, c)));
 					++numcols;
 				}
@@ -1662,7 +1662,7 @@ void InsetMathGrid::doDispatch(Cursor & cur, FuncRequest & cmd)
 				row_type crow = startrow + r;
 				addRow(crow - 1);
 				for (col_type c = 0; c < grid.ncols(); ++c)
-					cell(index(crow, c + startcol)).append(grid.cell(grid.index(r, c)));
+					cell(index(min(crow, nrows() - 1), min(c + startcol, ncols() - 1))).append(grid.cell(grid.index(r, c)));
 				if (hline_enabled)
 					rowinfo_[crow].lines += grid.rowinfo_[r].lines;
 				else {