alamb commented on a change in pull request #9536:
URL: https://github.com/apache/arrow/pull/9536#discussion_r579789879
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File path: rust/arrow/src/ipc/writer.rs
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@@ -434,6 +434,12 @@ impl<W: Write> FileWriter<W> {
/// Write footer and closing tag, then mark the writer as done
pub fn finish(&mut self) -> Result<()> {
+ if self.finished {
Review comment:
this looks like a good change to to me ( protect people from themselves)
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