Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/borrowck-auto-mut-ref-to-immut-var.rs b/src/test/ui/borrowck/borrowck-auto-mut-ref-to-immut-var.rs
new file mode 100644
index 000000000..247e3da18
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-auto-mut-ref-to-immut-var.rs
@@ -0,0 +1,16 @@
+// Tests that auto-ref can't create mutable aliases to immutable memory.
+
+struct Foo {
+    x: isize
+}
+
+impl Foo {
+    pub fn printme(&mut self) {
+        println!("{}", self.x);
+    }
+}
+
+fn main() {
+    let x = Foo { x: 3 };
+    x.printme();    //~ ERROR cannot borrow
+}