n.powi(i) gives huge compile errors

[WaffleLapkin]

Even simple non-typelevel usage of Pow trait leads to a very huge compiler error:

Example code:

use typenum::{P1, Pow};

fn doesnt_compile_with_huge_error() {
    P1::new().powi(P1::new());
}

This gives 344K error message (141 lines):

% cargo build > ./err0.txt 2>&1 || ls -sh ./err0.txt && wc -l ./err0.txt
344K ./err0.txt
141 ./err0.txt

Here is a full error on gist.

[WaffleLapkin]

However, with full path specified this example works just fine:

<P1 as Pow<P1>>::powi(P1::new(), P1::new());