src/test/ui/issues/issue-55796.stderr

   1 error[E0495]: cannot infer an appropriate lifetime due to conflicting requirements
   2   --> $DIR/issue-55796.rs:16:9
   3    |
   4 LL |         Box::new(self.out_edges(u).map(|e| e.target()))
   5    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   6    |
   7 note: first, the lifetime cannot outlive the lifetime `'a` as defined on the trait at 5:17...
   8   --> $DIR/issue-55796.rs:5:17
   9    |
  10 LL | pub trait Graph<'a> {
  11    |                 ^^
  12 note: ...so that the type `std::iter::Map<<Self as Graph<'a>>::EdgesIter, [closure@$DIR/issue-55796.rs:16:40: 16:54]>` will meet its required lifetime bounds
  13   --> $DIR/issue-55796.rs:16:9
  14    |
  15 LL |         Box::new(self.out_edges(u).map(|e| e.target()))
  16    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  17    = note: but, the lifetime must be valid for the static lifetime...
  18 note: ...so that the expression is assignable
  19   --> $DIR/issue-55796.rs:16:9
  20    |
  21 LL |         Box::new(self.out_edges(u).map(|e| e.target()))
  22    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  23    = note: expected  `std::boxed::Box<(dyn std::iter::Iterator<Item = <Self as Graph<'a>>::Node> + 'static)>`
  24               found  `std::boxed::Box<dyn std::iter::Iterator<Item = <Self as Graph<'a>>::Node>>`
  25
  26 error[E0495]: cannot infer an appropriate lifetime due to conflicting requirements
  27   --> $DIR/issue-55796.rs:21:9
  28    |
  29 LL |         Box::new(self.in_edges(u).map(|e| e.target()))
  30    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  31    |
  32 note: first, the lifetime cannot outlive the lifetime `'a` as defined on the trait at 5:17...
  33   --> $DIR/issue-55796.rs:5:17
  34    |
  35 LL | pub trait Graph<'a> {
  36    |                 ^^
  37 note: ...so that the type `std::iter::Map<<Self as Graph<'a>>::EdgesIter, [closure@$DIR/issue-55796.rs:21:39: 21:53]>` will meet its required lifetime bounds
  38   --> $DIR/issue-55796.rs:21:9
  39    |
  40 LL |         Box::new(self.in_edges(u).map(|e| e.target()))
  41    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  42    = note: but, the lifetime must be valid for the static lifetime...
  43 note: ...so that the expression is assignable
  44   --> $DIR/issue-55796.rs:21:9
  45    |
  46 LL |         Box::new(self.in_edges(u).map(|e| e.target()))
  47    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  48    = note: expected  `std::boxed::Box<(dyn std::iter::Iterator<Item = <Self as Graph<'a>>::Node> + 'static)>`
  49               found  `std::boxed::Box<dyn std::iter::Iterator<Item = <Self as Graph<'a>>::Node>>`
  50
  51 error: aborting due to 2 previous errors
  52
  53 For more information about this error, try `rustc --explain E0495`.