error[E0277]: the trait bound `f32: From<Drawable>` is not satisfied
 --> tests/compile-fail/build_bad_into.rs:5:24
  |
5 |       let _widget: f32 = build! {
  |  ________________________^
6 | |         Drawable { }
7 | |     };
  | |_____^ the trait `From<Drawable>` is not implemented for `f32`
  |
  = help: the following implementations were found:
            <f32 as From<i16>>
            <f32 as From<i8>>
            <f32 as From<u16>>
            <f32 as From<u8>>
  = note: required because of the requirements on the impl of `Into<f32>` for `Drawable`
  = note: this error originates in the macro `build` (in Nightly builds, run with -Z macro-backtrace for more info)