Literals don't have static lifetime

[jethrogb]

OK:

fn get_slice_ok() -> &'static [u8] {
    const CONST: &'static [u8] = &[0];
    CONST
}

Borrowck error:

fn get_slice_error() -> &'static [u8] {
    &[0]
}

But consts and literals are basically the same thing, so I'd expect this to work.

[durka]

It's not about slices: let _: &'static u8 = &42; doesn't work either.

[jethrogb]

Related #18852

[cramertj]

IIUC #38865 should fix this.

[jethrogb]

Huzzah!

From RFC 1414:

Summary

Promote constexpr rvalues to values in static memory instead of stack slots, and expose those in the language by being able to directly create 'static references to them. This would allow code like let x: &'static u32 = &42 to work.

[jethrogb]

I'm going to close this in favor of the tracking issue.