error[E0623]: lifetime mismatch
  --> $DIR/issue-90170-elision-mismatch.rs:8:47
   |
LL | pub fn foo(x: &mut Vec<&u8>, y: &u8) { x.push(y); }
   |                        ---      ---           ^ ...but data from `y` flows into `x` here
   |                                 |
   |                                 these two types are declared with different lifetimes...
   |
   = note: each elided lifetime in input position becomes a distinct lifetime
help: consider introducing a named lifetime parameter
   |
LL | pub fn foo<'a>(x: &mut Vec<&'a u8>, y: &'a u8) { x.push(y); }
   |           ++++              ++          ++

error[E0623]: lifetime mismatch
  --> $DIR/issue-90170-elision-mismatch.rs:10:51
   |
LL | pub fn foo2(x: &mut Vec<&'_ u8>, y: &u8) { x.push(y); }
   |                         ------      ---           ^ ...but data from `y` flows into `x` here
   |                                     |
   |                                     these two types are declared with different lifetimes...
   |
   = note: each elided lifetime in input position becomes a distinct lifetime
help: consider introducing a named lifetime parameter
   |
LL | pub fn foo2<'a>(x: &mut Vec<&'a u8>, y: &'a u8) { x.push(y); }
   |            ++++              ~~          ++

error[E0623]: lifetime mismatch
  --> $DIR/issue-90170-elision-mismatch.rs:12:70
   |
LL | pub fn foo3<'a>(_other: &'a [u8], x: &mut Vec<&u8>, y: &u8) { x.push(y); }
   |                                               ---      ---           ^ ...but data from `y` flows into `x` here
   |                                                        |
   |                                                        these two types are declared with different lifetimes...
   |
   = note: each elided lifetime in input position becomes a distinct lifetime
help: consider introducing a named lifetime parameter
   |
LL | pub fn foo3<'a>(_other: &'a [u8], x: &mut Vec<&'a u8>, y: &'a u8) { x.push(y); }
   |                                                ++          ++

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0623`.