New upstream version 1.66.0+dfsg1

[rustc.git] / src / test / ui / higher-rank-trait-bounds / hrtb-perfect-forwarding.stderr

warning: function cannot return without recursing
  --> $DIR/hrtb-perfect-forwarding.rs:16:1
   |
LL | / fn no_hrtb<'b, T>(mut t: T)
LL | | where
LL | |     T: Bar<&'b isize>,
   | |______________________^ cannot return without recursing
...
LL |       no_hrtb(&mut t);
   |       --------------- recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose
   = note: `#[warn(unconditional_recursion)]` on by default

warning: function cannot return without recursing
  --> $DIR/hrtb-perfect-forwarding.rs:25:1
   |
LL | / fn bar_hrtb<T>(mut t: T)
LL | | where
LL | |     T: for<'b> Bar<&'b isize>,
   | |______________________________^ cannot return without recursing
...
LL |       bar_hrtb(&mut t);
   |       ---------------- recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose

warning: function cannot return without recursing
  --> $DIR/hrtb-perfect-forwarding.rs:35:1
   |
LL | / fn foo_hrtb_bar_not<'b, T>(mut t: T)
LL | | where
LL | |     T: for<'a> Foo<&'a isize> + Bar<&'b isize>,
   | |_______________________________________________^ cannot return without recursing
...
LL |       foo_hrtb_bar_not(&mut t);
   |       ------------------------ recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose

error: lifetime may not live long enough
  --> $DIR/hrtb-perfect-forwarding.rs:43:5
   |
LL | fn foo_hrtb_bar_not<'b, T>(mut t: T)
   |                     -- lifetime `'b` defined here
...
LL |     foo_hrtb_bar_not(&mut t);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'static`
   |
note: due to current limitations in the borrow checker, this implies a `'static` lifetime
  --> $DIR/hrtb-perfect-forwarding.rs:37:8
   |
LL |     T: for<'a> Foo<&'a isize> + Bar<&'b isize>,
   |        ^^^^^^^^^^^^^^^^^^^^^^

error: implementation of `Bar` is not general enough
  --> $DIR/hrtb-perfect-forwarding.rs:43:5
   |
LL |     foo_hrtb_bar_not(&mut t);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `Bar` is not general enough
   |
   = note: `T` must implement `Bar<&'0 isize>`, for any lifetime `'0`...
   = note: ...but it actually implements `Bar<&'1 isize>`, for some specific lifetime `'1`

warning: function cannot return without recursing
  --> $DIR/hrtb-perfect-forwarding.rs:48:1
   |
LL | / fn foo_hrtb_bar_hrtb<T>(mut t: T)
LL | | where
LL | |     T: for<'a> Foo<&'a isize> + for<'b> Bar<&'b isize>,
   | |_______________________________________________________^ cannot return without recursing
...
LL |       foo_hrtb_bar_hrtb(&mut t);
   |       ------------------------- recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose

error: aborting due to 2 previous errors; 4 warnings emitted