error[E0277]: `dyn for<'a, 'b> Fn(&'a Foo<'b>) -> &'a Foo<'b>` cannot be shared between threads safely
  --> $DIR/rfc1623.rs:21:1
   |
LL | / static SOME_STRUCT: &SomeStruct = &SomeStruct {
LL | |     foo: &Foo { bools: &[false, true] },
LL | |     bar: &Bar { bools: &[true, true] },
LL | |     f: &id,
LL | |
LL | | };
   | |__^ `dyn for<'a, 'b> Fn(&'a Foo<'b>) -> &'a Foo<'b>` cannot be shared between threads safely
   |
   = help: within `&SomeStruct`, the trait `Sync` is not implemented for `dyn for<'a, 'b> Fn(&'a Foo<'b>) -> &'a Foo<'b>`
   = note: required because it appears within the type `&dyn for<'a, 'b> Fn(&'a Foo<'b>) -> &'a Foo<'b>`
note: required because it appears within the type `SomeStruct`
  --> $DIR/rfc1623.rs:11:8
   |
LL | struct SomeStruct<'x, 'y, 'z: 'x> {
   |        ^^^^^^^^^^
   = note: required because it appears within the type `&SomeStruct`
   = note: shared static variables must have a type that implements `Sync`

error[E0308]: mismatched types
  --> $DIR/rfc1623.rs:21:35
   |
LL |   static SOME_STRUCT: &SomeStruct = &SomeStruct {
   |  ___________________________________^
LL | |     foo: &Foo { bools: &[false, true] },
LL | |     bar: &Bar { bools: &[true, true] },
LL | |     f: &id,
LL | |
LL | | };
   | |_^ one type is more general than the other
   |
   = note: expected type `for<'a, 'b> Fn<(&'a Foo<'b>,)>`
              found type `Fn<(&Foo<'_>,)>`

error[E0308]: mismatched types
  --> $DIR/rfc1623.rs:21:35
   |
LL |   static SOME_STRUCT: &SomeStruct = &SomeStruct {
   |  ___________________________________^
LL | |     foo: &Foo { bools: &[false, true] },
LL | |     bar: &Bar { bools: &[true, true] },
LL | |     f: &id,
LL | |
LL | | };
   | |_^ one type is more general than the other
   |
   = note: expected type `for<'a, 'b> Fn<(&'a Foo<'b>,)>`
              found type `Fn<(&Foo<'_>,)>`

error: implementation of `FnOnce` is not general enough
  --> $DIR/rfc1623.rs:21:35
   |
LL |   static SOME_STRUCT: &SomeStruct = &SomeStruct {
   |  ___________________________________^
LL | |     foo: &Foo { bools: &[false, true] },
LL | |     bar: &Bar { bools: &[true, true] },
LL | |     f: &id,
LL | |
LL | | };
   | |_^ implementation of `FnOnce` is not general enough
   |
   = note: `fn(&'2 Foo<'_>) -> &'2 Foo<'_> {id::<&'2 Foo<'_>>}` must implement `FnOnce<(&'1 Foo<'b>,)>`, for any lifetime `'1`...
   = note: ...but it actually implements `FnOnce<(&'2 Foo<'_>,)>`, for some specific lifetime `'2`

error: implementation of `FnOnce` is not general enough
  --> $DIR/rfc1623.rs:21:35
   |
LL |   static SOME_STRUCT: &SomeStruct = &SomeStruct {
   |  ___________________________________^
LL | |     foo: &Foo { bools: &[false, true] },
LL | |     bar: &Bar { bools: &[true, true] },
LL | |     f: &id,
LL | |
LL | | };
   | |_^ implementation of `FnOnce` is not general enough
   |
   = note: `fn(&Foo<'2>) -> &Foo<'2> {id::<&Foo<'2>>}` must implement `FnOnce<(&'a Foo<'1>,)>`, for any lifetime `'1`...
   = note: ...but it actually implements `FnOnce<(&Foo<'2>,)>`, for some specific lifetime `'2`

error: aborting due to 5 previous errors

Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.
