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, 17 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/borrowck-unboxed-closures.rs b/src/test/ui/borrowck/borrowck-unboxed-closures.rs
new file mode 100644
index 000000000..f0048dd7d
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-unboxed-closures.rs
@@ -0,0 +1,17 @@
+fn a<F:Fn(isize, isize) -> isize>(mut f: F) {
+    let g = &mut f;
+    f(1, 2);    //~ ERROR cannot borrow `f` as immutable
+    use_mut(g);
+}
+fn b<F:FnMut(isize, isize) -> isize>(f: F) {
+    f(1, 2);    //~ ERROR cannot borrow `f` as mutable, as it is not declared as mutable
+}
+
+fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
+    f(1, 2);
+    f(1, 2);    //~ ERROR use of moved value
+}
+
+fn main() {}
+
+fn use_mut<T>(_: &mut T) { }