Example to isolate memory leak issue

examples2d/all_examples2.rs

@@ -12,6 +12,7 @@ use std::cmp::Ordering;
 
 mod add_remove2;
 mod debug_box_ball2;
+mod debug_infinite_fall;
 mod heightfield2;
 mod joints2;
 mod platform2;
@@ -58,6 +59,7 @@ pub fn main() {
         ("Pyramid", pyramid2::init_world),
         ("Sensor", sensor2::init_world),
         ("(Debug) box ball", debug_box_ball2::init_world),
+        ("(Debug) infinite fall", debug_infinite_fall::init_world),
     ];
 
     // Lexicographic sort, with stress tests moved at the end of the list.