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-rw-r--r--util/cairo-trace/trace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/util/cairo-trace/trace.c b/util/cairo-trace/trace.c
index 3c056134e..87b2df46e 100644
--- a/util/cairo-trace/trace.c
+++ b/util/cairo-trace/trace.c
@@ -299,8 +299,10 @@ _type_next_token (Type *t)
prev = &b->next;
b = b->next;
}
+ assert (prev != NULL);
bb = malloc (sizeof (struct _bitmap));
+
*prev = bb;
bb->next = b;
bb->min = min;