Commitff33a66

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regression test for leaks in the the Filter::next_chunk implementation

previously next_chunk would forget items rejected by the filter

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Lines changed: 13 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`use core::iter::*;`
	`2`	`+use std::rc::Rc;`
`2`	`3`
`3`	`4`	`#[test]`
`4`	`5`	`fntest_iterator_filter_count(){`
`@@ -50,3 +51,15 @@ fn test_double_ended_filter() {`
`50`	`51`	`assert_eq!(it.next().unwrap(),&2);`
`51`	`52`	`assert_eq!(it.next_back(),None);`
`52`	`53`	`}`
	`54`	`+`
	`55`	`+#[test]`
	`56`	`+fntest_next_chunk_does_not_leak(){`
	`57`	`+let drop_witness:[_;5] = std::array::from_fn(\|_\|Rc::new(()));`
	`58`	`+`
	`59`	`+let v =(0..5).map(\|i\| drop_witness[i].clone()).collect::<Vec<_>>();`
	`60`	`+let _ = v.into_iter().filter(\|_\|false).next_chunk::<1>();`
	`61`	`+`
	`62`	`+forref win drop_witness{`
	`63`	`+assert_eq!(Rc::strong_count(w),1);`
	`64`	`+}`
	`65`	`+}`

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