Bogus associated type HKT syntax causes ICE: "path not fully resolved"

[theemathas]

Code:

pub trait A : Copy {}

pub trait D {
    fn f<T>(self)
        where T<Bogus = Self::AlsoBogus>: A;
}

fn main() {}

playpen

ICE:

error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'path not fully resolved: PathResolution { base_def: DefSelfTy(7), last_private: LastMod(AllPublic), depth: 1 }', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/librustc/middle/def.rs:79

Probably a variant of #23543