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error[E0425]: cannot find value `unknown` in this scope
  --> $DIR/dont-autoderef-ty-with-escaping-var.rs:17:35
   |
LL |     <i32 as RefFoo<i32>>::ref_foo(unknown);
   |                                   ^^^^^^^ not found in this scope

error[E0277]: the trait bound `for<'a> &'a mut Vec<&'a u32>: Foo<'static, i32>` is not satisfied
  --> $DIR/dont-autoderef-ty-with-escaping-var.rs:17:35
   |
LL |     <i32 as RefFoo<i32>>::ref_foo(unknown);
   |     ----------------------------- ^^^^^^^ the trait `for<'a> Foo<'static, i32>` is not implemented for `&'a mut Vec<&'a u32>`
   |     |
   |     required by a bound introduced by this call
   |
note: required for `i32` to implement `RefFoo<i32>`
  --> $DIR/dont-autoderef-ty-with-escaping-var.rs:9:9
   |
LL | impl<T> RefFoo<T> for T
   |         ^^^^^^^^^     ^
LL | where
LL |     for<'a> &'a mut Vec<&'a u32>: Foo<'static, T>,
   |                                   --------------- unsatisfied trait bound introduced here

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0425.
For more information about an error, try `rustc --explain E0277`.