1 files changed, 32 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-20644.rs b/tests/ui/issues/issue-20644.rs
new file mode 100644
index 000000000..1b90727fb
--- /dev/null
+++ b/tests/ui/issues/issue-20644.rs
@@ -0,0 +1,32 @@
+// build-pass
+#![allow(dead_code)]
+#![allow(unused_imports)]
+#![allow(stable_features)]
+
+// A reduced version of the rustbook ice. The problem this encountered
+// had to do with codegen ignoring binders.
+
+// pretty-expanded FIXME #23616
+
+#![feature(os)]
+
+use std::iter;
+use std::os;
+use std::fs::File;
+use std::io::prelude::*;
+use std::env;
+use std::path::Path;
+
+pub fn parse_summary<R: Read>(_: R, _: &Path) {
+     let path_from_root = Path::new("");
+     Path::new(&"../".repeat(path_from_root.components().count() - 1));
+ }
+
+fn foo() {
+    let cwd = env::current_dir().unwrap();
+    let src = cwd.clone();
+    let summary = File::open(&src.join("SUMMARY.md")).unwrap();
+    let _ = parse_summary(summary, &src);
+}
+
+fn main() {}