c9f65fc942
The problem is that fcc_get_cache_next() is called in a context where context->default_cc_name is not set. We should call krb5_cc_default_name(), and that fixes the problem. There's a comment warning that this can result in reentering krb5_cc_cache_match(), but nothing in libkrb5 calls krb5_cc_cache_match(), so the comment is wrong, at least in the github tree. An alternative would be to call krb5_cc_set_default_name(NULL) in kuser/kinit.c before calling krb5_cc_cache_match(), however, that seems like an insufficiently general solution. Also, the semantics of krb5_cc_cache_match() would differ from MIT's -- it seems better to match MIT's semantics.
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