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-rw-r--r--utils/nsurl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/utils/nsurl.c b/utils/nsurl.c
index 030ce4694..ff7a8d71d 100644
--- a/utils/nsurl.c
+++ b/utils/nsurl.c
@@ -892,6 +892,7 @@ nsurl *nsurl_ref(nsurl *url)
void nsurl_unref(nsurl *url)
{
assert(url != NULL);
+ assert(url->count > 0);
if (--url->count > 0)
return;