don't add location to amb nodes
@@ -91,6 +91,8 @@ YYSTYPE mergeAmb(YYSTYPE x0, YYSTYPE x1) {
strcpy(symbol, prefix);
strcat(symbol, x0n->sort);
strcat(symbol, suffix);
+ n->location = x0n->location;
+ n->hasLocation = false;
n->symbol = symbol;
n->sort = x0n->sort;
n->str = false;
