gistfile1.txt

```
error[E0308]: mismatched types
  --> glutin/src/platform_impl/unix/unix.rs:55:39
   |
53 |       pub fn new(disp: &Display, cb: ConfigBuilder) -> Result<Box<dyn Iterator<Item = (ConfigAttribs, Config)>>, Error> {
   |                                                        ---------------------------------------------------------------- expected `std::result::Result<std::boxed::Box<(dyn std::iter::Iterator<Item = (config::ConfigAttribs, platform_impl::platform_impl::Config)> + 'static)>, winit_types::error::Error>` because of return type
54 |           match disp {
55 |               Display::Wayland(disp) => wayland::Config::new(disp, cb)
   |  _______________________________________^
56 | |                 .map(|configs| configs.map(|(attribs, config)| (attribs, Config::Wayland(config)))),
   | |___________________________________________________________________________________________________^ expected struct `std::boxed::Box`, found struct `std::iter::Map`
   |
   = note: expected enum `std::result::Result<std::boxed::Box<(dyn std::iter::Iterator<Item = (config::ConfigAttribs, platform_impl::platform_impl::Config)> + 'static)>, _>`
              found enum `std::result::Result<std::iter::Map<std::boxed::Box<dyn std::iter::Iterator<Item = (config::ConfigAttribs, platform_impl::platform_impl::wayland::Config)>>, [closure@glutin/src/platform_impl/unix/unix.rs:56:44: 56:98]>, _>`
```