error: tail calling intrinsics is not allowed
  --> $DIR/intrinsics.rs:5:14
   |
LL |     unsafe { become std::mem::transmute(()) }
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: tail calling intrinsics is not allowed
  --> $DIR/intrinsics.rs:10:5
   |
LL |     become std::intrinsics::ctlz(x)
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors