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more descriptive assertion failure for overflow

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Niko Matsakis 2018-10-09 18:00:27 -04:00 committed by GitHub
parent e42c68913e
commit a45d482a97
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src/runtime.rs
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@ -80,7 +80,7 @@ where
}
let old_revision = self.shared_state.revision.fetch_add(1, Ordering::SeqCst);
assert!(old_revision != usize::max_value());
assert!(old_revision != usize::max_value(), "revision overflow");
let result = Revision {
generation: 1 + old_revision as u64,
};