clippy warning on bitmask! macro

[vroussea]

Hello, I'm using bitmask macro in my code, and I'm getting a clippy warning for the following code :

#[allow(clippy::all)]
bitmask! {
    pub mask MethodsMask: u32 where flags MethodFlag {
        Post = Methods::POST,
        Get = Methods::GET,
        Delete = Methods::DELETE,
        Update = Methods::UPDATE,
        Other = Methods::OTHER,
    }
}

pub struct Methods {

}

impl Methods {
    pub const POST: u32 = 1;
    pub const GET: u32 = 2;
    pub const DELETE: u32 = 4;
    pub const UPDATE: u32 = 8;
    pub const OTHER: u32 = 16;
}

The warning :

warning: transmute from a reference to a reference
  --> src/***/***.rs:46:1
   |
46 | / bitmask! {
47 | |     pub mask MethodsMask: u32 where flags MethodFlag {
48 | |         Post = Methods::POST,
49 | |         Get = Methods::GET,
...  |
53 | |     }
54 | | }
   | |_^
   |
   = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
   = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)