1 files changed, 55 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/issue-53092-2.stderr b/src/test/ui/type-alias-impl-trait/issue-53092-2.stderr
new file mode 100644
index 000000000..1b89d5571
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/issue-53092-2.stderr
@@ -0,0 +1,55 @@
+error[E0391]: cycle detected when computing type of `Bug::{opaque#0}`
+  --> $DIR/issue-53092-2.rs:4:18
+   |
+LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
+   |                  ^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: ...which requires type-checking `CONST_BUG`...
+  --> $DIR/issue-53092-2.rs:6:1
+   |
+LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: ...which requires computing layout of `Bug<u8, ()>`...
+   = note: ...which requires normalizing `Bug<u8, ()>`...
+   = note: ...which again requires computing type of `Bug::{opaque#0}`, completing the cycle
+note: cycle used when checking item types in top-level module
+  --> $DIR/issue-53092-2.rs:1:1
+   |
+LL | / #![feature(type_alias_impl_trait)]
+LL | | #![allow(dead_code)]
+LL | |
+LL | | type Bug<T, U> = impl Fn(T) -> U + Copy;
+...  |
+LL | |     CONST_BUG(0);
+LL | | }
+   | |_^
+
+error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
+  --> $DIR/issue-53092-2.rs:6:41
+   |
+LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
+   |                                         ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: source type: `[closure@$DIR/issue-53092-2.rs:6:61: 6:68]` (0 bits)
+   = note: target type: `Bug<u8, ()>` (size can vary because of [type error])
+
+error[E0277]: the trait bound `U: From<T>` is not satisfied
+  --> $DIR/issue-53092-2.rs:10:5
+   |
+LL |     |x| x.into()
+   |     ^^^^^^^^^^^^ the trait `From<T>` is not implemented for `U`
+   |
+note: required by a bound in `make_bug`
+  --> $DIR/issue-53092-2.rs:9:19
+   |
+LL | fn make_bug<T, U: From<T>>() -> Bug<T, U> {
+   |                   ^^^^^^^ required by this bound in `make_bug`
+help: consider restricting type parameter `U`
+   |
+LL | type Bug<T, U: std::convert::From<T>> = impl Fn(T) -> U + Copy;
+   |              +++++++++++++++++++++++
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0277, E0391, E0512.
+For more information about an error, try `rustc --explain E0277`.