first part of issue-40000.rs is now passing

src/test/compile-fail/issue-40000.rs

@@ -11,8 +11,7 @@
 #![feature(closure_to_fn_coercion)]
 
 fn main() {
-    let bar: fn(&mut u32) = |_| {}; //~ ERROR mismatched types
-    //~| expected concrete lifetime, found bound lifetime parameter
+    let bar: fn(&mut u32) = |_| {};
 
     fn foo(x: Box<Fn(&i32)>) {}
     let bar = Box::new(|x: &i32| {}) as Box<Fn(_)>;