rollup merge of #20645: nikomatsakis/rustbook-ice

Conflicts:
	src/librustc/middle/mem_categorization.rs
	src/librustc/middle/ty.rs
	src/librustc_trans/trans/base.rs
	src/librustc_trans/trans/expr.rs
	src/librustc_trans/trans/foreign.rs
	src/librustc_typeck/check/mod.rs

src/test/run-pass/issue-20644.rs

@@ -0,0 +1,35 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// A reduced version of the rustbook ice. The problem this encountered
+// had to do with trans ignoring binders.
+
+#![feature(slicing_syntax)]
+#![feature(associated_types)]
+#![feature(macro_rules)]
+
+use std::iter;
+use std::os;
+use std::io::File;
+
+#[allow(unused)]
+pub fn parse_summary<R: Reader>(_: R, _: &Path) {
+     let path_from_root = Path::new("");
+     Path::new(iter::repeat("../")
+               .take(path_from_root.components().count() - 1)
+               .collect::<String>());
+ }
+
+fn main() {
+    let cwd = os::getcwd().unwrap();
+    let src = cwd.clone();
+    let summary = File::open(&src.join("SUMMARY.md"));
+    let _ = parse_summary(summary, &src);
+}