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error[E0308]: mismatched types
--> $DIR/hr-subtype.rs:54:13
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LL | gimme::<$t1>(None::<$t2>);
| ^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other
...
LL | / check! { bound_a_vs_free_x: (for<'a> fn(&'a u32),
LL | | fn(&'x u32)) }
| |______________- in this macro invocation
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= note: expected enum `Option<for<'a> fn(&'a u32)>`
found enum `Option<fn(&u32)>`
= note: this error originates in the macro `check` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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