AVIOContext has got an av_class member that only gets set if
opening the context using avio_open2, but not if allocating a
custom IO context. A caller that wants to read AVOptions from
an AVIOContext (recursively using AV_OPT_SEARCH_CHILDREN) may
not know if the AVIOContext actually has got a class set or not.
---
IMO it's better to fail cleanly here than to force all such callers
to manually check the av_class member.
---
libavutil/opt.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavutil/opt.c b/libavutil/opt.c
index f2b9473..cba5b29 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -650,6 +650,9 @@ const AVOption *av_opt_find2(void *obj, const char *name,
const char *unit,
const AVClass *c = *(AVClass**)obj;
const AVOption *o = NULL;
+ if (!c)
+ return NULL;
+
if (search_flags & AV_OPT_SEARCH_CHILDREN) {
if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
const AVClass *child = NULL;
--
1.7.9.4
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