let mut m = String::new();
let len = v.len();
for (i, (name, n)) in v.into_iter().enumerate() {
- m.push_str(if n == 1 {
+ let help_name = if name.is_empty() {
+ format!("argument {}", i + 1)
+ } else {
format!("`{}`", name)
+ };
+
+ m.push_str(if n == 1 {
+ help_name
} else {
- format!("one of `{}`'s {} elided lifetimes", name, n)
+ format!("one of {}'s {} elided lifetimes", help_name, n)
}[]);
if len == 2 && i == 0 {
--- /dev/null
+// 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.
+
+#![feature(unboxed_closures)]
+#![allow(dead_code)]
+
+type foo = fn(&u8, &u8) -> &u8; //~ ERROR missing lifetime specifier
+//~^ HELP the signature does not say whether it is borrowed from argument 1 or argument 2
+
+fn bar<F: Fn(&u8, &u8) -> &u8>(f: &F) {} //~ ERROR missing lifetime specifier
+//~^ HELP the signature does not say whether it is borrowed from argument 1 or argument 2
+
+fn main() {}