src/test/ui/higher-rank-trait-bounds/hrtb-perfect-forwarding.stderr

   1 warning: function cannot return without recursing
   2   --> $DIR/hrtb-perfect-forwarding.rs:16:1
   3    |
   4 LL | / fn no_hrtb<'b, T>(mut t: T)
   5 LL | | where
   6 LL | |     T: Bar<&'b isize>,
   7    | |______________________^ cannot return without recursing
   8 ...
   9 LL |       no_hrtb(&mut t);
  10    |       --------------- recursive call site
  11    |
  12    = help: a `loop` may express intention better if this is on purpose
  13    = note: `#[warn(unconditional_recursion)]` on by default
  14
  15 warning: function cannot return without recursing
  16   --> $DIR/hrtb-perfect-forwarding.rs:25:1
  17    |
  18 LL | / fn bar_hrtb<T>(mut t: T)
  19 LL | | where
  20 LL | |     T: for<'b> Bar<&'b isize>,
  21    | |______________________________^ cannot return without recursing
  22 ...
  23 LL |       bar_hrtb(&mut t);
  24    |       ---------------- recursive call site
  25    |
  26    = help: a `loop` may express intention better if this is on purpose
  27
  28 warning: function cannot return without recursing
  29   --> $DIR/hrtb-perfect-forwarding.rs:35:1
  30    |
  31 LL | / fn foo_hrtb_bar_not<'b, T>(mut t: T)
  32 LL | | where
  33 LL | |     T: for<'a> Foo<&'a isize> + Bar<&'b isize>,
  34    | |_______________________________________________^ cannot return without recursing
  35 ...
  36 LL |       foo_hrtb_bar_not(&mut t);
  37    |       ------------------------ recursive call site
  38    |
  39    = help: a `loop` may express intention better if this is on purpose
  40
  41 error: lifetime may not live long enough
  42   --> $DIR/hrtb-perfect-forwarding.rs:43:5
  43    |
  44 LL | fn foo_hrtb_bar_not<'b, T>(mut t: T)
  45    |                     -- lifetime `'b` defined here
  46 ...
  47 LL |     foo_hrtb_bar_not(&mut t);
  48    |     ^^^^^^^^^^^^^^^^^^^^^^^^ requires that `'b` must outlive `'static`
  49    |
  50 note: due to current limitations in the borrow checker, this implies a `'static` lifetime
  51   --> $DIR/hrtb-perfect-forwarding.rs:37:8
  52    |
  53 LL |     T: for<'a> Foo<&'a isize> + Bar<&'b isize>,
  54    |        ^^^^^^^^^^^^^^^^^^^^^^
  55
  56 error: implementation of `Bar` is not general enough
  57   --> $DIR/hrtb-perfect-forwarding.rs:43:5
  58    |
  59 LL |     foo_hrtb_bar_not(&mut t);
  60    |     ^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `Bar` is not general enough
  61    |
  62    = note: `T` must implement `Bar<&'0 isize>`, for any lifetime `'0`...
  63    = note: ...but it actually implements `Bar<&'1 isize>`, for some specific lifetime `'1`
  64
  65 warning: function cannot return without recursing
  66   --> $DIR/hrtb-perfect-forwarding.rs:48:1
  67    |
  68 LL | / fn foo_hrtb_bar_hrtb<T>(mut t: T)
  69 LL | | where
  70 LL | |     T: for<'a> Foo<&'a isize> + for<'b> Bar<&'b isize>,
  71    | |_______________________________________________________^ cannot return without recursing
  72 ...
  73 LL |       foo_hrtb_bar_hrtb(&mut t);
  74    |       ------------------------- recursive call site
  75    |
  76    = help: a `loop` may express intention better if this is on purpose
  77
  78 error: aborting due to 2 previous errors; 4 warnings emitted
  79