Dylan DPC b3657f92d1
Rollup merge of #106918 - dtolnay:heapretain, r=the8472
Rebuild BinaryHeap on unwind from retain

This closes the hole identified in https://github.com/rust-lang/rust/issues/71503#issuecomment-1383251315 which had made it possible for the caller to end up with a heap in invalid state. As of #105851, heaps in invalid state are not supposed to exist.
2023-02-24 12:02:41 +05:30
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