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error: conflicting implementations of trait `FnMarker` for type `fn(&_)`
--> $DIR/negative-coherence-placeholder-region-constraints-on-unification.rs:21:1
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LL | impl<T: ?Sized + Marker> FnMarker for fn(T) {}
| ------------------------------------------- first implementation here
LL | impl<T: ?Sized> FnMarker for fn(&T) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `fn(&_)`
|
= warning: the behavior may change in a future release
= note: for more information, see issue #56105 <https://github.com/rust-lang/rust/issues/56105>
= note: downstream crates may implement trait `Marker` for type `&_`
= note: this behavior recently changed as a result of a bug fix; see rust-lang/rust#56105 for details
note: the lint level is defined here
--> $DIR/negative-coherence-placeholder-region-constraints-on-unification.rs:4:11
|
LL | #![forbid(coherence_leak_check)]
| ^^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error
|
