error[E0689]: can't call method `pow` on ambiguous numeric type `{integer}`
  --> $DIR/ambiguous-numeric-in-closure-ref.rs:6:35
   |
LL |     let _ = (0..10).filter(|&v| v.pow(2) > 0);
   |                              -    ^^^
   |                              |
   |                              you must specify a type for this binding
   |
help: specify the type in the closure argument list
   |
LL |     let _ = (0..10).filter(|&v: &i32| v.pow(2) > 0);
   |                               ++++++

error[E0689]: can't call method `pow` on ambiguous numeric type `{integer}`
  --> $DIR/ambiguous-numeric-in-closure-ref.rs:11:37
   |
LL |     let _ = v.iter().filter(|&&v| v.pow(2) > 0);
   |                                -    ^^^
   |                                |
   |                                you must specify a type for this binding
   |
help: specify the type in the closure argument list
   |
LL |     let _ = v.iter().filter(|&&v: &&i32| v.pow(2) > 0);
   |                                 +++++++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0689`.