1 files changed, 43 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrow-tuple-fields.rs b/tests/ui/borrowck/borrow-tuple-fields.rs
new file mode 100644
index 000000000..c628fa49e
--- /dev/null
+++ b/tests/ui/borrowck/borrow-tuple-fields.rs
@@ -0,0 +1,43 @@
+struct Foo(Box<isize>, isize);
+
+struct Bar(isize, isize);
+
+
+
+
+
+fn main() {
+    let x: (Box<_>, _) = (Box::new(1), 2);
+    let r = &x.0;
+    let y = x; //~ ERROR cannot move out of `x` because it is borrowed
+
+    r.use_ref();
+
+    let mut x = (1, 2);
+    let a = &x.0;
+    let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable because it is also borrowed as
+    a.use_ref();
+
+    let mut x = (1, 2);
+    let a = &mut x.0;
+    let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable more than once at a time
+    a.use_ref();
+
+    let x = Foo(Box::new(1), 2);
+    let r = &x.0;
+    let y = x; //~ ERROR cannot move out of `x` because it is borrowed
+    r.use_ref();
+
+    let mut x = Bar(1, 2);
+    let a = &x.0;
+    let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable because it is also borrowed as
+    a.use_ref();
+
+    let mut x = Bar(1, 2);
+    let a = &mut x.0;
+    let b = &mut x.0; //~ ERROR cannot borrow `x.0` as mutable more than once at a time
+    a.use_mut();
+}
+
+trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
+impl<T> Fake for T { }