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dont increase the allocated size of vec (#10701)

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This commit is contained in:
Shawn Tabrizi
2022-01-20 14:17:16 -04:00
committed by GitHub
parent 362a6d9b28
commit 4d7d1eaaf8
1 changed files with 4 additions and 3 deletions
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substrate/frame/support/src/storage/bounded_vec.rs
+4 -3
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@@ -222,16 +222,17 @@ impl<T, S: Get<u32>> BoundedVec<T, S> {
/// Returns `true` if the item was inserted.
pub fn force_insert_keep_left(&mut self, index: usize, element: T) -> bool {
// Check against panics.
if Self::bound() < index || self.len() < index {
if Self::bound() < index || self.len() < index || Self::bound() == 0 {
return false
}
// Noop condition.
if Self::bound() == index && self.len() <= Self::bound() {
return false
}
// Cannot panic since self.len() >= index;
// Cannot panic since `Self.bound() > 0`
self.0.truncate(Self::bound() - 1);
// Cannot panic since `self.len() >= index`;
self.0.insert(index, element);
self.0.truncate(Self::bound());
true
}