error[E0759]: `x` has an anonymous lifetime `'_` but it needs to satisfy a `'static` lifetime requirement
  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:5:9
   |
LL |   fn foo(x: &()) {
   |             --- this data with an anonymous lifetime `'_`...
LL |       bar(|| {
   |  _________^
LL | |
LL | |         let _ = x;
LL | |     })
   | |_____^ ...is used here...
   |
note: ...and is required to live as long as `'static` here
  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:5:5
   |
LL |     bar(|| {
   |     ^^^
note: `'static` lifetime requirement introduced by this bound
  --> $DIR/closure-bounds-static-cant-capture-borrowed.rs:1:39
   |
LL | fn bar<F>(blk: F) where F: FnOnce() + 'static {
   |                                       ^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0759`.