Indentation failure with many generic arguments

When a set of generic arguments hits max-width, rustfmt seems to have trouble with indentation.

Here's an example:

fn omg() {
fn bar() {
self.core
.exchange::<LeaseBufReader<_, BUFSIZ>, _, LeaseBufWriter<_, BUFSIZ>, _>(
device_index,
src,
dest,
)
.map_err(RequestError::from)
}
}

$ rustfmt --config max_width=80 test.rs

fn omg() {
    fn bar() {
        self.core
.exchange::<LeaseBufReader<_, BUFSIZ>, _, LeaseBufWriter<_, BUFSIZ>, _>(
device_index,
src,
dest,
)
.map_err(RequestError::from)
    }
}

It properly indents the functions, but then gives up on the call to .exchange<...>.

Reproduce the issue with the Rust snippet in test.rs using rustfmt --config max_width=80 test.rs. Trace the formatting path for the multiline generic .exchange call, then verify that its receiver and arguments retain the surrounding function indentation without regressing the shown formatting.