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Diffstat (limited to '')
| -rw-r--r-- | library/alloc/src/vec/splice.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/library/alloc/src/vec/splice.rs b/library/alloc/src/vec/splice.rs index bad765c7f..1861147fe 100644 --- a/library/alloc/src/vec/splice.rs +++ b/library/alloc/src/vec/splice.rs @@ -54,6 +54,12 @@ impl<I: Iterator, A: Allocator> ExactSizeIterator for Splice<'_, I, A> {} impl<I: Iterator, A: Allocator> Drop for Splice<'_, I, A> { fn drop(&mut self) { self.drain.by_ref().for_each(drop); + // At this point draining is done and the only remaining tasks are splicing + // and moving things into the final place. + // Which means we can replace the slice::Iter with pointers that won't point to deallocated + // memory, so that Drain::drop is still allowed to call iter.len(), otherwise it would break + // the ptr.sub_ptr contract. + self.drain.iter = (&[]).iter(); unsafe { if self.drain.tail_len == 0 { |