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error: item does not constrain `Bug::{opaque#0}`
--> $DIR/issue-53092-2.rs:7:7
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LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
| ^^^^^^^^^
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= note: consider removing `#[define_opaque]` or adding an empty `#[define_opaque()]`
note: this opaque type is supposed to be constrained
--> $DIR/issue-53092-2.rs:4:18
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LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
| ^^^^^^^^^^^^^^^^^^^^^^
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/issue-53092-2.rs:7:41
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LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
| ^^^^^^^^^^^^^^^^^^^
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= note: source type: `{closure@$DIR/issue-53092-2.rs:7:61: 7:68}` (0 bits)
= note: target type: `{type error}` (the type has an unknown layout)
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0512`.
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