review failing compile-fail tests

Author: RalfJung

tests/compile-fail/cast_box_int_to_fn_ptr.rs

@@ -4,8 +4,8 @@
 fn main() {
     let b = Box::new(42);
     let g = unsafe {
-        std::mem::transmute::<&usize, &fn(i32)>(&b)
+        std::mem::transmute::<&Box<usize>, &fn(i32)>(&b)
     };
 
-    (*g)(42) //~ ERROR a memory access tried to interpret some bytes as a pointer
+    (*g)(42) //~ ERROR tried to treat a memory pointer as a function pointer
 }

tests/compile-fail/cast_int_to_fn_ptr.rs

@@ -6,5 +6,5 @@ fn main() {
         std::mem::transmute::<usize, fn(i32)>(42)
     };
 
-    g(42) //~ ERROR a memory access tried to interpret some bytes as a pointer
+    g(42) //~ ERROR dangling pointer was dereferenced
 }