From 5bfc8a42eb4106635b934f4231d3eaed1f4ea183 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sun, 9 Jan 2022 21:32:49 +0100
Subject: [PATCH] Handle invalid struct members

When something goes wrong when parsing a struct member, e.g. the type does
not exist, a nullptr is added to the struct member list. This will cause a
crash when iterating over the list.

E.g.

```
struct packed {
  logc x;
} s;
```

Add a check so that nullptr members are not added to the list.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
 parse.y | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/parse.y b/parse.y
index d7c923e13..b00658723 100644
--- a/parse.y
+++ b/parse.y
@@ -3036,12 +3036,12 @@ struct_data_type
 struct_union_member_list
   : struct_union_member_list struct_union_member
       { std::list<struct_member_t*>*tmp = $1;
-	tmp->push_back($2);
+	if ($2) tmp->push_back($2);
 	$$ = tmp;
       }
   | struct_union_member
       { std::list<struct_member_t*>*tmp = new std::list<struct_member_t*>;
-	tmp->push_back($1);
+	if ($1) tmp->push_back($1);
 	$$ = tmp;
       }
   ;