Incorrect "explicit lifetime name needed" error

[varkor]

struct Nested<K>(K);

trait X<'a, K: 'a> {
    fn foo<'b, L: X<&'b Nested<K>>>();
}

produces:

error[E0637]: `&` without an explicit lifetime name cannot be used here
 --> src/lib.rs:4:19
  |
4 |     fn foo<'b, L: X<&'b Nested<K>>>();
  |                   ^^^^^^^^^^^^^^^^ explicit lifetime name needed here

despite there being no unnamed &.

[Phosphorus15]

This error report is obviously incorrect, maybe we should elide this for the lifetime inferencer to check ? Or should we simply report an error with different message here, which means a new error code should be created?