1 files changed, 75 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-22992.rs b/tests/ui/issues/issue-22992.rs
new file mode 100644
index 000000000..292a0ae29
--- /dev/null
+++ b/tests/ui/issues/issue-22992.rs
@@ -0,0 +1,75 @@
+// run-pass
+
+struct X { val: i32 }
+impl std::ops::Deref for X {
+    type Target = i32;
+    fn deref(&self) -> &i32 { &self.val }
+}
+
+
+trait            M                   { fn m(self); }
+impl             M for i32           { fn m(self) { println!("i32::m()"); } }
+impl             M for X             { fn m(self) { println!("X::m()"); } }
+impl<'a>         M for &'a X         { fn m(self) { println!("&X::m()"); } }
+impl<'a, 'b>     M for &'a &'b X     { fn m(self) { println!("&&X::m()"); } }
+impl<'a, 'b, 'c> M for &'a &'b &'c X { fn m(self) { println!("&&&X::m()"); } }
+
+trait            RefM                   { fn refm(&self); }
+impl             RefM for i32           { fn refm(&self) { println!("i32::refm()"); } }
+impl             RefM for X             { fn refm(&self) { println!("X::refm()"); } }
+impl<'a>         RefM for &'a X         { fn refm(&self) { println!("&X::refm()"); } }
+impl<'a, 'b>     RefM for &'a &'b X     { fn refm(&self) { println!("&&X::refm()"); } }
+impl<'a, 'b, 'c> RefM for &'a &'b &'c X { fn refm(&self) { println!("&&&X::refm()"); } }
+
+struct Y { val: i32 }
+impl std::ops::Deref for Y {
+    type Target = i32;
+    fn deref(&self) -> &i32 { &self.val }
+}
+
+struct Z { val: Y }
+impl std::ops::Deref for Z {
+    type Target = Y;
+    fn deref(&self) -> &Y { &self.val }
+}
+
+struct A;
+impl std::marker::Copy for A {}
+impl Clone for A { fn clone(&self) -> Self { *self } }
+impl             M for             A { fn m(self) { println!("A::m()"); } }
+impl<'a, 'b, 'c> M for &'a &'b &'c A { fn m(self) { println!("&&&A::m()"); } }
+impl             RefM for             A { fn refm(&self) { println!("A::refm()"); } }
+impl<'a, 'b, 'c> RefM for &'a &'b &'c A { fn refm(&self) { println!("&&&A::refm()"); } }
+
+fn main() {
+    // I'll use @ to denote left side of the dot operator
+    (*X{val:42}).m();        // i32::refm() , self == @
+    X{val:42}.m();           // X::m()      , self == @
+    (&X{val:42}).m();        // &X::m()     , self == @
+    (&&X{val:42}).m();       // &&X::m()    , self == @
+    (&&&X{val:42}).m();      // &&&X:m()    , self == @
+    (&&&&X{val:42}).m();     // &&&X::m()   , self == *@
+    (&&&&&X{val:42}).m();    // &&&X::m()   , self == **@
+
+    (*X{val:42}).refm();     // i32::refm() , self == @
+    X{val:42}.refm();        // X::refm()   , self == @
+    (&X{val:42}).refm();     // X::refm()   , self == *@
+    (&&X{val:42}).refm();    // &X::refm()  , self == *@
+    (&&&X{val:42}).refm();   // &&X::refm() , self == *@
+    (&&&&X{val:42}).refm();  // &&&X::refm(), self == *@
+    (&&&&&X{val:42}).refm(); // &&&X::refm(), self == **@
+
+    Y{val:42}.refm();        // i32::refm() , self == *@
+    Z{val:Y{val:42}}.refm(); // i32::refm() , self == **@
+
+    A.m();                   // A::m()      , self == @
+    // without the Copy trait, (&A).m() would be a compilation error:
+    // cannot move out of borrowed content
+    (&A).m();                // A::m()      , self == *@
+    (&&A).m();               // &&&A::m()   , self == &@
+    (&&&A).m();              // &&&A::m()   , self == @
+    A.refm();                // A::refm()   , self == @
+    (&A).refm();             // A::refm()   , self == *@
+    (&&A).refm();            // A::refm()   , self == **@
+    (&&&A).refm();           // &&&A::refm(), self == @
+}