Internal compiler error when compiling simple code using `OsStr` and `Path`

Compiling the following simple code triggers an internal compiler error. You can reproduce this issue also on the Rust playground website, with all "stable", "beta" and "nightly" channels.

```rust
use std::{ffi::OsStr, path::Path};

fn main() {
    match Path::new("test.log").extension() {
        Some(OsStr::new("log")) => println!("log"),
        _ => println!("not log"),
    }
}
```