From c0ebbc4edfeaf16a6a5f4392ea097ea3d72a0e06 Mon Sep 17 00:00:00 2001
From: "kr.angelov" <kr.angelov@gmail.com>
Date: Thu, 16 Oct 2014 11:40:47 +0000
Subject: [PATCH] bugfix in the parser for abstract expressions in the C
 runtime

---
 src/runtime/c/pgf/expr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/runtime/c/pgf/expr.c b/src/runtime/c/pgf/expr.c
index f3cbf1f20..3c643e28a 100644
--- a/src/runtime/c/pgf/expr.c
+++ b/src/runtime/c/pgf/expr.c
@@ -320,6 +320,8 @@ pgf_expr_parser_term(PgfExprParser* parser)
 	case PGF_TOKEN_LTRIANGLE: {
 		pgf_expr_parser_token(parser);
 		PgfExpr expr = pgf_expr_parser_expr(parser);
+		if (gu_variant_is_null(expr))
+			return gu_null_variant;
 		
 		if (parser->token_tag != PGF_TOKEN_COLON) {
 			return gu_null_variant;
@@ -327,6 +329,8 @@ pgf_expr_parser_term(PgfExprParser* parser)
 		pgf_expr_parser_token(parser);
 
 		PgfType* type = pgf_expr_parser_type(parser);
+		if (type == NULL)
+			return gu_null_variant;
 
 		if (parser->token_tag != PGF_TOKEN_RTRIANGLE) {
 			return gu_null_variant;