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

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error[E0277]: `F` cannot be sent between threads safely
--> $DIR/closure-bounds-cant-promote-superkind-in-struct.rs:5:22
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|
LL | struct X<F> where F: FnOnce() + 'static + Send {
| ---------------------------------------------- required by `X`
...
LL | fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
| ^^^^ - help: consider further restricting type parameter `F`: `, F: std::marker::Send`
| |
| `F` cannot be sent between threads safely
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|
= help: the trait `std::marker::Send` is not implemented for `F`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.