evaluate: check for NULL type inside typeof

This should fix the segfault report by Randy.
It still doesn't parse the struct attribute correctly though.

Signed-off-by: Christopher <sparse@chrisli.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/evaluate.c b/evaluate.c
index 28bfd7c6..cdbd0640 100644
--- a/evaluate.c
+++ b/evaluate.c
@@ -340,7 +340,9 @@ static inline int classify_type(struct symbol *type, struct symbol **base)
 		type = type->ctype.base_type;
 	if (type->type == SYM_TYPEOF) {
 		type = evaluate_expression(type->initializer);
-		if (type->type == SYM_NODE)
+		if (!type)
+			type = &bad_ctype;
+		else if (type->type == SYM_NODE)
 			type = type->ctype.base_type;
 	}
 	if (type->type == SYM_ENUM)