Write a random question that a {role} Rust programmer named {name} would ask about {topic}. The question should be the user asking {problem_type}. Provide sample code and or error messages if applicable. The question should be concise and to the point, and should not be too long. The example code and questions should vary and be unique. The format of the response should have a title and body. The title should be a single line, and the body should be a multi-line string. Delimit the title and body with a blank line and the words 'Title:' and 'Body:' respectively. Do not mention the name of the programmer in the question.