error[E0425]: cannot find function `f` in this scope
  --> $DIR/nested-cfg-attr-conditional-compilation.rs:17:5
   |
LL |     f()
   |     ^ not found in this scope
   |
note: found an item that was configured out
  --> $DIR/nested-cfg-attr-conditional-compilation.rs:14:4
   |
LL | #[cfg_attr(all(), cfg_attr(all(), cfg(false)))]
   |                                       ----- the item is gated here
LL | fn f() {}
   |    ^

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0425`.