The following ICEs:fn foo(x: &bool) -> impl Into<&bool> { x }
The message is: error: internal compiler error: /checkout/src/librustc_typeck/check/mod.rs:618: escaping regions in predicate Obligation(predicate=Binder(TraitPredicate(<_ as std::convert::Into<&bool>>)),depth=0) --> src/main.rs:6:21.
Should we explicitly disallow lifetime elision in impl Trait?
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