Test the two-stage exception handler in code

src/lib.rs

@@ -12,6 +12,7 @@
 #![feature(alloc, collections)]
 #![feature(asm)]
 #![feature(naked_functions)]
+#![feature(core_intrinsics)]
 #![no_std]
 
 extern crate rlibc;
@@ -56,7 +57,7 @@ pub extern "C" fn rust_main(multiboot_information_address: usize) {
         unsafe { asm!("mov dx, 0; div dx" ::: "ax", "dx" : "volatile", "intel") }
     }
 
-    //println!("{:?}", divide_by_zero());
+    println!("{:?}", divide_by_zero());
 
     // provoke a page fault inside println
     println!("{:?}", unsafe { *(0xdeadbeaf as *mut u64) = 42 });