X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FMathParser.cpp;h=d259a19332dacb0b093586952c734640cd2a2e3e;hb=eb065995b10ca55e93c4d465027f40312142dc1d;hp=36be12c2ec94a29a5c4508013c7016e45af82b96;hpb=a74e1b096ce9de1a8783143698e2979426d7c220;p=lyx.git

diff --git a/src/mathed/MathParser.cpp b/src/mathed/MathParser.cpp
index 36be12c2ec..d259a19332 100644
--- a/src/mathed/MathParser.cpp
+++ b/src/mathed/MathParser.cpp
@@ -1552,17 +1552,24 @@ bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
 		else if (t.cs() == "kern") {
 			// FIXME: A hack...
 			docstring s;
+			int num_tokens = 0;
 			while (true) {
 				Token const & t = getToken();
+				++num_tokens;
 				if (!good()) {
-					putback();
+					s.clear();
+					while (num_tokens--)
+						putback();
 					break;
 				}
 				s += t.character();
 				if (isValidLength(to_utf8(s)))
 					break;
 			}
-			cell->push_back(MathAtom(new InsetMathKern(s)));
+			if (s.empty())
+				cell->push_back(MathAtom(new InsetMathKern));
+			else
+				cell->push_back(MathAtom(new InsetMathKern(s)));
 		}
 
 		else if (t.cs() == "label") {