src/test/ui/closures/closure-bounds-cant-promote-superkind-in-struct.stderr

   1 error[E0277]: `F` cannot be sent between threads safely
   2   --> $DIR/closure-bounds-cant-promote-superkind-in-struct.rs:5:22
   3    |
   4 LL | fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
   5    |                      ^^^^ `F` cannot be sent between threads safely
   6    |
   7 note: required by a bound in `X`
   8   --> $DIR/closure-bounds-cant-promote-superkind-in-struct.rs:1:43
   9    |
  10 LL | struct X<F> where F: FnOnce() + 'static + Send {
  11    |                                           ^^^^ required by this bound in `X`
  12 help: consider further restricting this bound
  13    |
  14 LL | fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static + std::marker::Send {
  15    |                                                       +++++++++++++++++++
  16
  17 error: aborting due to previous error
  18
  19 For more information about this error, try `rustc --explain E0277`.