1 error: lifetime may not live long enough
2 --> $DIR/issue-79187-2.rs:9:24
4 LL | take_foo(|a: &i32| a);
5 | - - ^ returning this value requires that `'1` must outlive `'2`
7 | | return type of closure is &'2 i32
8 | let's call the lifetime of this reference `'1`
10 error: lifetime may not live long enough
11 --> $DIR/issue-79187-2.rs:10:34
13 LL | take_foo(|a: &i32| -> &i32 { a });
14 | - - ^ returning this value requires that `'1` must outlive `'2`
16 | | let's call the lifetime of this reference `'2`
17 | let's call the lifetime of this reference `'1`
19 error: implementation of `FnOnce` is not general enough
20 --> $DIR/issue-79187-2.rs:8:5
23 | ^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
25 = note: closure with signature `fn(&'2 i32) -> &i32` must implement `FnOnce<(&'1 i32,)>`, for any lifetime `'1`...
26 = note: ...but it actually implements `FnOnce<(&'2 i32,)>`, for some specific lifetime `'2`
28 error[E0308]: mismatched types
29 --> $DIR/issue-79187-2.rs:8:5
32 | ^^^^^^^^^^^^^^^ one type is more general than the other
34 = note: expected type `for<'r> Fn<(&'r i32,)>`
35 found type `Fn<(&i32,)>`
36 note: this closure does not fulfill the lifetime requirements
37 --> $DIR/issue-79187-2.rs:8:14
41 note: the lifetime requirement is introduced here
42 --> $DIR/issue-79187-2.rs:5:21
44 LL | fn take_foo(_: impl Foo) {}
47 error[E0308]: mismatched types
48 --> $DIR/issue-79187-2.rs:9:5
50 LL | take_foo(|a: &i32| a);
51 | ^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other
53 = note: expected reference `&i32`
54 found reference `&i32`
55 note: the lifetime requirement is introduced here
56 --> $DIR/issue-79187-2.rs:5:21
58 LL | fn take_foo(_: impl Foo) {}
61 error[E0308]: mismatched types
62 --> $DIR/issue-79187-2.rs:10:5
64 LL | take_foo(|a: &i32| -> &i32 { a });
65 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ one type is more general than the other
67 = note: expected reference `&i32`
68 found reference `&i32`
69 note: the lifetime requirement is introduced here
70 --> $DIR/issue-79187-2.rs:5:21
72 LL | fn take_foo(_: impl Foo) {}
75 error: aborting due to 6 previous errors
77 For more information about this error, try `rustc --explain E0308`.