remotes: avoid panic with default resolver conf
@@ -81,7 +81,7 @@ func (a *dockerAuthorizer) AddResponses(ctx context.Context, responses []*http.R
// TODO(dmcg): Store challenge, not token
// Move token fetching to authorize
return a.setTokenAuth(ctx, host, c.parameters)
- } else if c.scheme == basicAuth {
+ } else if c.scheme == basicAuth && a.credentials != nil {
// TODO: Resolve credentials on authorize
username, secret, err := a.credentials(host)
if err != nil {
