block: qcow2: Flush the buffer explicitly when writing pointer table #7528
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Previously the code relies on the implicit flush when BufWriter is dropped. That's not safe. Per BufWriter's document: ``` It is critical to call flush before BufWriter<W> is dropped. Though dropping will attempt to flush the contents of the buffer, any errors that happen in the process of dropping will be ignored. Calling flush ensures that the buffer is empty and thus dropping will not even attempt file operations. ``` Signed-off-by: Wei Liu <[email protected]>
weltling
approved these changes
Nov 30, 2025
rbradford
approved these changes
Nov 30, 2025
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Previously the code relies on the implicit flush when BufWriter is dropped. That's not safe.
Per BufWriter's document: