rp.is_none ICE: struct mistyped as trait instantiated with &'self int

[pnkfelix]

This is an ICE on some obviously bogus input code.

struct A<X>;

fn foo<I:A<&'self int>>() { }

fn main() { }

Transcript:

% RUST_LOG=rustc=1 rustc --version /tmp/baz2.rs
/Users/pnkfelix/opt/rust-dbg/bin/rustc 0.8-pre (dd5c737 2013-09-08 12:05:55 -0700)
host: x86_64-apple-darwin
% RUST_LOG=rustc=1 rustc /tmp/baz2.rs
task <unnamed> failed at 'assertion failed: rp.is_none()', /Users/pnkfelix/Dev/Mozilla/rust.git/src/librustc/middle/typeck/collect.rs:1108
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug
note: try running with RUST_LOG=rustc=1 to get further details and report the results to github.com/mozilla/rust/issues
task <unnamed> failed at 'explicit failure', /Users/pnkfelix/Dev/Mozilla/rust.git/src/librustc/rustc.rs:376
% 

[pnkfelix]

probable subbug of #4846. I'm closing as an assumed duplicate, but it would be good to include it as a test when #4846 gets fixed.