move a new crash test to ui, fixed by checking the whole body

Author: adwinwhite

tests/crashes/117696-1.rs renamed to tests/ui/codegen/normalization-overflow/recursion-issue-117696-1.rs

@@ -1,4 +1,4 @@
-//@ known-bug: #117696
+//@ build-fail
 fn main() {
     let mut it = (Empty);
     rec(&mut it);
@@ -23,6 +23,7 @@ where
 {
     if () == () {
         T::count(it);
+        //~^ ERROR: reached the recursion limit while instantiating
     } else {
         rec(identity(&mut it))
     }

tests/ui/codegen/normalization-overflow/recursion-issue-117696-1.stderr

@@ -0,0 +1,11 @@
+error: reached the recursion limit while instantiating `<&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut Empty as Iterator>::count`
+  --> $DIR/recursion-issue-117696-1.rs:25:9
+   |
+LL |         T::count(it);
+   |         ^^^^^^^^^^^^
+   |
+note: `count` defined here
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+
+error: aborting due to 1 previous error
+