Promote crash tests to ui.

tests/ui/type-alias-impl-trait/bound-lifetime-through-dyn-trait.rs

@@ -0,0 +1,18 @@
+#![feature(type_alias_impl_trait)]
+
+trait Captures<'a> {}
+impl<T> Captures<'_> for T {}
+
+fn dyn_hoops<T: Sized>() -> dyn for<'a> Iterator<Item = impl Captures<'a>> {
+    //~^ ERROR `impl Trait` cannot capture higher-ranked lifetime from `dyn` type
+    loop {}
+}
+
+pub fn main() {
+    //~^ ERROR item does not constrain `Opaque::{opaque#0}`, but has it in its signature
+    type Opaque = impl Sized;
+    fn define() -> Opaque {
+        let x: Opaque = dyn_hoops::<()>();
+        x
+    }
+}

tests/ui/type-alias-impl-trait/bound-lifetime-through-dyn-trait.stderr

@@ -0,0 +1,28 @@
+error[E0657]: `impl Trait` cannot capture higher-ranked lifetime from `dyn` type
+  --> $DIR/bound-lifetime-through-dyn-trait.rs:6:71
+   |
+LL | fn dyn_hoops<T: Sized>() -> dyn for<'a> Iterator<Item = impl Captures<'a>> {
+   |                                                                       ^^
+   |
+note: lifetime declared here
+  --> $DIR/bound-lifetime-through-dyn-trait.rs:6:37
+   |
+LL | fn dyn_hoops<T: Sized>() -> dyn for<'a> Iterator<Item = impl Captures<'a>> {
+   |                                     ^^
+
+error: item does not constrain `Opaque::{opaque#0}`, but has it in its signature
+  --> $DIR/bound-lifetime-through-dyn-trait.rs:11:8
+   |
+LL | pub fn main() {
+   |        ^^^^
+   |
+   = note: consider moving the opaque type's declaration and defining uses into a separate module
+note: this opaque type is in the signature
+  --> $DIR/bound-lifetime-through-dyn-trait.rs:13:19
+   |
+LL |     type Opaque = impl Sized;
+   |                   ^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0657`.

tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.rs

@@ -0,0 +1,13 @@
+#![allow(incomplete_features)]
+#![feature(non_lifetime_binders)]
+
+trait Trait<T: ?Sized> {}
+
+fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
+    //~^ ERROR associated type `Assoc` not found for `Trait`
+    //~| ERROR associated type `Assoc` not found for `Trait`
+    //~| the trait bound `{integer}: Trait<()>` is not satisfied
+    16
+}
+
+fn main() {}

tests/ui/type-alias-impl-trait/non-lifetime-binder-in-constraint.stderr

@@ -0,0 +1,30 @@
+error[E0220]: associated type `Assoc` not found for `Trait`
+  --> $DIR/non-lifetime-binder-in-constraint.rs:6:39
+   |
+LL | fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
+   |                                       ^^^^^ associated type `Assoc` not found
+
+error[E0220]: associated type `Assoc` not found for `Trait`
+  --> $DIR/non-lifetime-binder-in-constraint.rs:6:39
+   |
+LL | fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
+   |                                       ^^^^^ associated type `Assoc` not found
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error[E0277]: the trait bound `{integer}: Trait<()>` is not satisfied
+  --> $DIR/non-lifetime-binder-in-constraint.rs:6:17
+   |
+LL | fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait<()>` is not implemented for `{integer}`
+   |
+help: this trait has no implementations, consider adding one
+  --> $DIR/non-lifetime-binder-in-constraint.rs:4:1
+   |
+LL | trait Trait<T: ?Sized> {}
+   | ^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0220, E0277.
+For more information about an error, try `rustc --explain E0220`.

tests/ui/type-alias-impl-trait/non-lifetime-binder.rs

@@ -0,0 +1,10 @@
+#![allow(incomplete_features)]
+#![feature(non_lifetime_binders)]
+
+trait Trait<T> {}
+
+fn f() -> impl for<T> Trait<impl Trait<T>> {}
+//~^ ERROR nested `impl Trait` is not allowed
+//~| ERROR the trait bound `(): Trait<impl Trait<T>>` is not satisfied
+
+fn main() {}

tests/ui/type-alias-impl-trait/non-lifetime-binder.stderr

@@ -0,0 +1,25 @@
+error[E0666]: nested `impl Trait` is not allowed
+  --> $DIR/non-lifetime-binder.rs:6:29
+   |
+LL | fn f() -> impl for<T> Trait<impl Trait<T>> {}
+   |           ------------------^^^^^^^^^^^^^-
+   |           |                 |
+   |           |                 nested `impl Trait` here
+   |           outer `impl Trait`
+
+error[E0277]: the trait bound `(): Trait<impl Trait<T>>` is not satisfied
+  --> $DIR/non-lifetime-binder.rs:6:11
+   |
+LL | fn f() -> impl for<T> Trait<impl Trait<T>> {}
+   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait<impl Trait<T>>` is not implemented for `()`
+   |
+help: this trait has no implementations, consider adding one
+  --> $DIR/non-lifetime-binder.rs:4:1
+   |
+LL | trait Trait<T> {}
+   | ^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0277, E0666.
+For more information about an error, try `rustc --explain E0277`.