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error[E0367]: `Drop` impl requires `the constant `_` has type `usize`` but the struct it is implemented for does not
--> $DIR/unconstrained_const_param_on_drop.rs:3:6
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LL | impl<const UNUSED: usize> Drop for Foo {}
| ^^^^^^^^^^^^^^^^^^^
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note: the implementor must specify the same requirement
--> $DIR/unconstrained_const_param_on_drop.rs:1:1
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LL | struct Foo {}
| ^^^^^^^^^^
error[E0046]: not all trait items implemented, missing: `drop`
--> $DIR/unconstrained_const_param_on_drop.rs:3:1
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LL | impl<const UNUSED: usize> Drop for Foo {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `drop` in implementation
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= help: implement the missing item: `fn drop(&mut self) { todo!() }`
error[E0207]: the const parameter `UNUSED` is not constrained by the impl trait, self type, or predicates
--> $DIR/unconstrained_const_param_on_drop.rs:3:6
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LL | impl<const UNUSED: usize> Drop for Foo {}
| ^^^^^^^^^^^^^^^^^^^ unconstrained const parameter
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= note: expressions using a const parameter must map each value to a distinct output value
= note: proving the result of expressions other than the parameter are unique is not supported
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0046, E0207, E0367.
For more information about an error, try `rustc --explain E0046`.
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