error: `iter` method without an `IntoIterator` impl for `&$BitFlags`
 --> src/lib.rs:5:1
  |
5 | / bitflags! {
6 | |     struct Foo : u32 {
7 | |         const BAR = 0;
8 | |     }
9 | | }
  | |_^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_without_into_iter
note: the lint level is defined here
 --> src/lib.rs:1:9
  |
1 | #![deny(clippy::pedantic)]
  |         ^^^^^^^^^^^^^^^^
  = note: `#[deny(clippy::iter_without_into_iter)]` implied by `#[deny(clippy::pedantic)]`
  = note: this error originates in the macro `__impl_public_bitflags_iter` which comes from the expansion of the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)

error: `iter` method without an `IntoIterator` impl for `&$BitFlags`
 --> src/lib.rs:5:1
  |
5 | / bitflags! {
6 | |     struct Foo : u32 {
7 | |         const BAR = 0;
8 | |     }
9 | | }
  | |_^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_without_into_iter
  = note: this error originates in the macro `__impl_public_bitflags_iter` which comes from the expansion of the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile `playground` (lib) due to 2 previous errors