Make it a ui test, update

tests/run-pass/mut_range_bound.rs

@@ -1,15 +0,0 @@
-#![feature(plugin)]
-#![plugin(clippy)]
-
-// cause the build to fail if this warning is invoked
-#![deny(check_for_loop_mut_bound)]
-
-// an example
-fn mut_range_bound() {
-    let mut m = 4;
-    for i in 0..m { continue; } // ERROR One of the range bounds is mutable
-}
-
-fn main(){
-    mut_range_bound();
-}

tests/ui/mut_range_bound.rs

@@ -37,8 +37,8 @@ fn mut_range_bound_no_mutation() {
 fn mut_borrow_range_bound() {
     let mut m = 4;
     for i in 0..m {
-        let n = &mut m;  // warning here?
-        *n += 1;         // or here?
+        let n = &mut m;  // warning
+        *n += 1;
     }
 }
 

tests/ui/mut_range_bound.stderr

@@ -0,0 +1,34 @@
+error: attempt to mutate range bound within loop; note that the range of the loop is unchanged
+  --> $DIR/mut_range_bound.rs:18:21
+   |
+18 |     for i in 0..m { m = 5; } // warning
+   |                     ^^^^^
+   |
+   = note: `-D mut-range-bound` implied by `-D warnings`
+
+error: attempt to mutate range bound within loop; note that the range of the loop is unchanged
+  --> $DIR/mut_range_bound.rs:23:22
+   |
+23 |     for i in m..10 { m *= 2; } // warning
+   |                      ^^^^^^
+
+error: attempt to mutate range bound within loop; note that the range of the loop is unchanged
+  --> $DIR/mut_range_bound.rs:29:21
+   |
+29 |     for i in m..n { m = 5; n = 7; } // warning (1 for each mutated bound)
+   |                     ^^^^^
+
+error: attempt to mutate range bound within loop; note that the range of the loop is unchanged
+  --> $DIR/mut_range_bound.rs:29:28
+   |
+29 |     for i in m..n { m = 5; n = 7; } // warning (1 for each mutated bound)
+   |                            ^^^^^
+
+error: attempt to mutate range bound within loop; note that the range of the loop is unchanged
+  --> $DIR/mut_range_bound.rs:40:22
+   |
+40 |         let n = &mut m;  // warning
+   |                      ^
+
+error: aborting due to 5 previous errors
+