1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/borrowck/issue-17263.rs b/tests/ui/borrowck/issue-17263.rs
new file mode 100644
index 000000000..4f560b065
--- /dev/null
+++ b/tests/ui/borrowck/issue-17263.rs
@@ -0,0 +1,23 @@
+// check-pass
+
+struct Foo { a: isize, b: isize }
+
+fn main() {
+    let mut x: Box<_> = Box::new(Foo { a: 1, b: 2 });
+    let (a, b) = (&mut x.a, &mut x.b);
+
+    let mut foo: Box<_> = Box::new(Foo { a: 1, b: 2 });
+    let (c, d) = (&mut foo.a, &foo.b);
+
+    // We explicitly use the references created above to illustrate that the
+    // borrow checker is accepting this code *not* because of artificially
+    // short lifetimes, but rather because it understands that all the
+    // references are of disjoint parts of memory.
+    use_imm(d);
+    use_mut(c);
+    use_mut(b);
+    use_mut(a);
+}
+
+fn use_mut<T>(_: &mut T) { }
+fn use_imm<T>(_: &T) { }