message: core_local: Add debug assertion
diff: @@ -40,6 +40,7 @@ impl CoreLocal {
  }
  pub fn get_raw() -> *mut Self {
  + debug_assert_ne!(VirtAddr::zero(), GsBase::read());
  let raw;
  unsafe {
  asm!("mov {}, gs:0", out(reg) raw, options(nomem, nostack, preserves_flags));
  