then immediately close the database using sqlite3_close().
Copy makes it trivially easy to accidentally duplicate a Rust value that is actually a thin handle to a resource, resulting in null pointers. Just make a habit of avoiding it on exported wrappers. This can be a hard muscle memory to break since we usually want Copy wherever possible in normal Rust code.。新收录的资料对此有专业解读
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block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.