FP `expected fn foo(), found unsafe fn bar()`: match arms that returns different kinds of functions

[matthiaskrgr]

const fn foo() {}
unsafe fn bar() {}
fn baz() {}

fn main() {
 let x = match 2 {
  2 => foo,
  3 => bar,
  _ => baz
 };
}

this compiles with rustc but shows error in ra diag:

at crate ra, file /tmp/ra/src/main.rs: Error RustcHardError("E0308") from LineCol { line: 7, col: 7 } to LineCol { line: 7, col: 10 }: expected fn foo(), found unsafe fn bar()

[ChayimFriedman2]

Hmm, our coercion logic is copied from rustc but we might now handle coercing fn() -> unsafe fn() correctly.