error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
  --> $DIR/E0621-does-not-trigger-for-closures.rs:15:5
   |
LL |     invoke(&x, |a, b| if a > b { a } else { b });
   |     ^^^^^^
   |
note: first, the lifetime cannot outlive the anonymous lifetime #2 defined on the body at 15:16...
  --> $DIR/E0621-does-not-trigger-for-closures.rs:15:16
   |
LL |     invoke(&x, |a, b| if a > b { a } else { b });
   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...so that reference does not outlive borrowed content
  --> $DIR/E0621-does-not-trigger-for-closures.rs:15:45
   |
LL |     invoke(&x, |a, b| if a > b { a } else { b });
   |                                             ^
note: but, the lifetime must be valid for the call at 15:5...
  --> $DIR/E0621-does-not-trigger-for-closures.rs:15:5
   |
LL |     invoke(&x, |a, b| if a > b { a } else { b });
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...so type `&i32` of expression is valid during the expression
  --> $DIR/E0621-does-not-trigger-for-closures.rs:15:5
   |
LL |     invoke(&x, |a, b| if a > b { a } else { b });
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0495`.