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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/nll/issue-62007-assign-differing-fields.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/nll/issue-62007-assign-differing-fields.rs')
-rw-r--r--src/test/ui/nll/issue-62007-assign-differing-fields.rs25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/nll/issue-62007-assign-differing-fields.rs b/src/test/ui/nll/issue-62007-assign-differing-fields.rs
new file mode 100644
index 000000000..29d92b7b8
--- /dev/null
+++ b/src/test/ui/nll/issue-62007-assign-differing-fields.rs
@@ -0,0 +1,25 @@
+// Double-check we didn't go too far with our resolution to issue
+// #62007: assigning over a field projection (`list.1 = n;` in this
+// case) should kill only borrows of `list.1`; `list.0` can *not*
+// necessarily be borrowed on the next iteration through the loop.
+
+#![allow(dead_code)]
+
+struct List<T> {
+ value: T,
+ next: Option<Box<List<T>>>,
+}
+
+fn to_refs<'a, T>(mut list: (&'a mut List<T>, &'a mut List<T>)) -> Vec<&'a mut T> {
+ let mut result = vec![];
+ loop {
+ result.push(&mut (list.0).value); //~ ERROR cannot borrow `list.0.value` as mutable
+ if let Some(n) = (list.0).next.as_mut() { //~ ERROR cannot borrow `list.0.next` as mutable
+ list.1 = n;
+ } else {
+ return result;
+ }
+ }
+}
+
+fn main() {}