Call PEM_read_bio_ex() and expect a failure. There should be no dangling
ptrs and therefore there should be no double free if we free the ptrs on
error.
Reviewed-by: NPaul Dale <pauli@openssl.org>
Reviewed-by: NHugo Landau <hlandau@openssl.org>
Signed-off-by: Ncode4lala <fengziteng2@huawei.com>