1. Call findresource with a callback function in cloud provisioning.
2. some of Enrollee in a given network will respond with the request.
3. On a targetr enrollee is discoved, cloud provisioning proceeds.
4. After cloud provisioning, the callback for discovery is destroyed.
5. After then, a Enrollee in a given newtork sends a response now.
In step 5, because the callback is destroyed, a crash would happen.