From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/borrowck/issue-62007-assign-box.rs | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 tests/ui/borrowck/issue-62007-assign-box.rs (limited to 'tests/ui/borrowck/issue-62007-assign-box.rs') diff --git a/tests/ui/borrowck/issue-62007-assign-box.rs b/tests/ui/borrowck/issue-62007-assign-box.rs new file mode 100644 index 000000000..f6fbea821 --- /dev/null +++ b/tests/ui/borrowck/issue-62007-assign-box.rs @@ -0,0 +1,27 @@ +// run-pass + +// Issue #62007: assigning over a deref projection of a box (in this +// case, `*list = n;`) should be able to kill all borrows of `*list`, +// so that `*list` can be borrowed on the next iteration through the +// loop. + +#![allow(dead_code)] + +struct List { + value: T, + next: Option>>, +} + +fn to_refs(mut list: Box<&mut List>) -> Vec<&mut T> { + let mut result = vec![]; + loop { + result.push(&mut list.value); + if let Some(n) = list.next.as_mut() { + *list = n; + } else { + return result; + } + } +} + +fn main() {} -- cgit v1.2.3