1 files changed, 150 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/dont-suggest-ref/duplicate-suggestions.rs b/src/test/ui/suggestions/dont-suggest-ref/duplicate-suggestions.rs
new file mode 100644
index 000000000..bf0c1dc27
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-ref/duplicate-suggestions.rs
@@ -0,0 +1,150 @@
+#[derive(Clone)]
+enum Either {
+    One(X),
+    Two(X),
+}
+
+#[derive(Clone)]
+struct X(Y);
+
+#[derive(Clone)]
+struct Y;
+
+
+pub fn main() {
+    let e = Either::One(X(Y));
+    let mut em = Either::One(X(Y));
+
+    let r = &e;
+    let rm = &mut Either::One(X(Y));
+
+    let x = X(Y);
+    let mut xm = X(Y);
+
+    let s = &x;
+    let sm = &mut X(Y);
+
+    let ve = vec![Either::One(X(Y))];
+
+    let vr = &ve;
+    let vrm = &mut vec![Either::One(X(Y))];
+
+    let vx = vec![X(Y)];
+
+    let vs = &vx;
+    let vsm = &mut vec![X(Y)];
+
+    // test for duplicate suggestions
+
+    let &(X(_t), X(_u)) = &(x.clone(), x.clone());
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&`
+    //~| SUGGESTION (X(_t), X(_u))
+    if let &(Either::One(_t), Either::Two(_u)) = &(e.clone(), e.clone()) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&`
+    //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+    while let &(Either::One(_t), Either::Two(_u)) = &(e.clone(), e.clone()) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&`
+    //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+    match &(e.clone(), e.clone()) {
+        //~^ ERROR cannot move
+        &(Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        &(Either::Two(_t), Either::One(_u)) => (),
+        //~^ HELP consider removing the `&`
+        //~| SUGGESTION (Either::Two(_t), Either::One(_u))
+        _ => (),
+    }
+    match &(e.clone(), e.clone()) {
+        //~^ ERROR cannot move
+        &(Either::One(_t), Either::Two(_u))
+        //~^ HELP consider removing the `&`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        | &(Either::Two(_t), Either::One(_u)) => (),
+        // FIXME: would really like a suggestion here too
+        _ => (),
+    }
+    match &(e.clone(), e.clone()) {
+        //~^ ERROR cannot move
+        &(Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        &(Either::Two(ref _t), Either::One(ref _u)) => (),
+        _ => (),
+    }
+    match &(e.clone(), e.clone()) {
+        //~^ ERROR cannot move
+        &(Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        (Either::Two(_t), Either::One(_u)) => (),
+        _ => (),
+    }
+    fn f5(&(X(_t), X(_u)): &(X, X)) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&`
+    //~| SUGGESTION (X(_t), X(_u))
+
+    let &mut (X(_t), X(_u)) = &mut (xm.clone(), xm.clone());
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&mut`
+    //~| SUGGESTION (X(_t), X(_u))
+    if let &mut (Either::One(_t), Either::Two(_u)) = &mut (em.clone(), em.clone()) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&mut`
+    //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+    while let &mut (Either::One(_t), Either::Two(_u)) = &mut (em.clone(), em.clone()) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&mut`
+    //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+    match &mut (em.clone(), em.clone()) {
+        //~^ ERROR cannot move
+        &mut (Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        &mut (Either::Two(_t), Either::One(_u)) => (),
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::Two(_t), Either::One(_u))
+        _ => (),
+    }
+    match &mut (em.clone(), em.clone()) {
+        //~^ ERROR cannot move
+        &mut (Either::One(_t), Either::Two(_u))
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        | &mut (Either::Two(_t), Either::One(_u)) => (),
+        // FIXME: would really like a suggestion here too
+        _ => (),
+    }
+    match &mut (em.clone(), em.clone()) {
+        //~^ ERROR cannot move
+        &mut (Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        &mut (Either::Two(ref _t), Either::One(ref _u)) => (),
+        _ => (),
+    }
+    match &mut (em.clone(), em.clone()) {
+        //~^ ERROR cannot move
+        &mut (Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        &mut (Either::Two(ref mut _t), Either::One(ref mut _u)) => (),
+        _ => (),
+    }
+    match &mut (em.clone(), em.clone()) {
+        //~^ ERROR cannot move
+        &mut (Either::One(_t), Either::Two(_u)) => (),
+        //~^ HELP consider removing the `&mut`
+        //~| SUGGESTION (Either::One(_t), Either::Two(_u))
+        (Either::Two(_t), Either::One(_u)) => (),
+        _ => (),
+    }
+    fn f6(&mut (X(_t), X(_u)): &mut (X, X)) { }
+    //~^ ERROR cannot move
+    //~| HELP consider removing the `&mut`
+    //~| SUGGESTION (X(_t), X(_u))
+}