type parameter M/#0 (M/0) out of range when substituting, -Z mir-opt-level=2

[tmiasko]

Code

use std::marker::PhantomData;

const N: usize = 1;

pub struct Elem<M> {
    pub x: [usize; N],
    pub m: PhantomData<M>,
}

pub fn f() -> Elem<()> {
    g()
}

#[inline]
pub fn g<M>() -> Elem<M> {
    Elem {
        x: [0; N],
        m: PhantomData,
    }
}

pub fn main() {
    f();
}

Error output

error: internal compiler error: src/librustc_middle/ty/subst.rs:529:17: type parameter `M/#0` (M/0) out of range when substituting, substs=[]
...
note: rustc 1.48.0-nightly (d006f5734 2020-08-28) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z mir-opt-level=2

The ICE happens during codegen, but it seems to be caused by MIR inliner.