"Generate constant" assist creates constant with function's type when invoked on a const generic argument.

[wildbook]

• serverVersion: '0.3.859'
• nightlyReleaseId: 55412114

Example:

fn main() {
    fn foo<const X: usize>() { }
    foo::<BAR>();
}

Invoking the "Generate constant" assist on BAR results in:

fn main() {
    fn foo<const X: usize>() { }
    const BAR: fn foo() = ;
    foo::<BAR>();
}

It should instead use the argument's type and generate const BAR: usize = .

vMbZ0ItN6JeCb75U.1.mp4

[Veykril]

I assume the problem here is us not resolving const generics, so Semantics::type_of_expression falls back to climbing up the ancestors until it finds the foo function path querying that for its type and filling that in.
cc #8655