Fix to bug 2362: Deleting superscript also deletes subscript.

[lyx.git] / src / mathed / math_macro.C

diff --git a/src/mathed/math_macro.C b/src/mathed/math_macro.C
index 12682fad5e391246de35a4a7bf118f9796953278..a403edfc9c1ddf6569ed07dd8b4b9a95a5ff5c62 100644 (file)
--- a/src/mathed/math_macro.C
+++ b/src/mathed/math_macro.C
@@ -129,8 +129,17 @@ void MathMacro::validate(LaTeXFeatures & features) const
 InsetBase * MathMacro::editXY(LCursor & cur, int x, int y)
 {
        // We may have 0 arguments, but MathNestInset requires at least one.
-       if (nargs() > 0)
+       if (nargs() > 0) {
+               // Prevent crash due to cold coordcache
+               // FIXME: This is only a workaround, the call of
+               // MathNestInset::editXY is correct. The correct fix would
+               // ensure that the coordcache of the arguments is valid.
+               if (!editing(&cur.bv())) {
+                       edit(cur, true);
+                       return this;
+               }
                return MathNestInset::editXY(cur, x, y);
+       }
        return this;
 }