Move "auto trait leak" impl-trait cycle dependency test to ui

Author: estebank

src/test/compile-fail/impl-trait/auto-trait-leak.rs renamed to src/test/ui/impl-trait/auto-trait-leak.rs

@@ -0,0 +1,70 @@
+error[E0277]: the trait bound `std::rc::Rc<std::cell::Cell<i32>>: std::marker::Send` is not satisfied in `impl std::ops::Fn<(i32,)>`
+  --> $DIR/auto-trait-leak.rs:27:5
+   |
+27 |     send(before());
+   |     ^^^^ `std::rc::Rc<std::cell::Cell<i32>>` cannot be sent between threads safely
+   |
+   = help: within `impl std::ops::Fn<(i32,)>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::Cell<i32>>`
+   = note: required because it appears within the type `[closure@$DIR/auto-trait-leak.rs:21:5: 21:22 p:std::rc::Rc<std::cell::Cell<i32>>]`
+   = note: required because it appears within the type `impl std::ops::Fn<(i32,)>`
+   = note: required by `send`
+
+error[E0277]: the trait bound `std::rc::Rc<std::cell::Cell<i32>>: std::marker::Send` is not satisfied in `impl std::ops::Fn<(i32,)>`
+  --> $DIR/auto-trait-leak.rs:34:5
+   |
+34 |     send(after());
+   |     ^^^^ `std::rc::Rc<std::cell::Cell<i32>>` cannot be sent between threads safely
+   |
+   = help: within `impl std::ops::Fn<(i32,)>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::Cell<i32>>`
+   = note: required because it appears within the type `[closure@$DIR/auto-trait-leak.rs:46:5: 46:22 p:std::rc::Rc<std::cell::Cell<i32>>]`
+   = note: required because it appears within the type `impl std::ops::Fn<(i32,)>`
+   = note: required by `send`
+
+error[E0391]: unsupported cyclic reference between types/traits detected
+  --> $DIR/auto-trait-leak.rs:52:1
+   |
+52 | / fn cycle1() -> impl Clone {
+53 | |     //~^ ERROR unsupported cyclic reference between types/traits detected
+54 | |     //~| cyclic reference
+55 | |     //~| NOTE the cycle begins when processing `cycle1`...
+...  |
+60 | |     Rc::new(Cell::new(5))
+61 | | }
+   | |_^ cyclic reference
+   |
+note: the cycle begins when processing `cycle1`...
+  --> $DIR/auto-trait-leak.rs:52:1
+   |
+52 | / fn cycle1() -> impl Clone {
+53 | |     //~^ ERROR unsupported cyclic reference between types/traits detected
+54 | |     //~| cyclic reference
+55 | |     //~| NOTE the cycle begins when processing `cycle1`...
+...  |
+60 | |     Rc::new(Cell::new(5))
+61 | | }
+   | |_^
+note: ...which then requires processing `cycle2::{{impl-Trait}}`...
+  --> $DIR/auto-trait-leak.rs:63:16
+   |
+63 | fn cycle2() -> impl Clone {
+   |                ^^^^^^^^^^
+note: ...which then requires processing `cycle2`...
+  --> $DIR/auto-trait-leak.rs:63:1
+   |
+63 | / fn cycle2() -> impl Clone {
+64 | |     //~^ NOTE ...which then requires processing `cycle2::{{impl-Trait}}`...
+65 | |     //~| NOTE ...which then requires processing `cycle2`...
+66 | |     send(cycle1().clone());
+67 | |
+68 | |     Rc::new(String::from("foo"))
+69 | | }
+   | |_^
+note: ...which then requires processing `cycle1::{{impl-Trait}}`...
+  --> $DIR/auto-trait-leak.rs:52:16
+   |
+52 | fn cycle1() -> impl Clone {
+   |                ^^^^^^^^^^
+   = note: ...which then again requires processing `cycle1`, completing the cycle.
+
+error: aborting due to 3 previous errors
+