Disallow unsafe code in the devtools and devtools_traits crates.

components/devtools/actor.rs

@@ -44,6 +44,7 @@ impl Actor + Send {
     /// Returns some reference to the boxed value if it is of type `T`, or
     /// `None` if it isn't.
     #[inline]
+    #[allow(unsafe_code)]
     pub fn downcast_ref<T: Reflect + 'static>(&self) -> Option<&T> {
         if self.is::<T>() {
             unsafe {
@@ -61,6 +62,7 @@ impl Actor + Send {
     /// Returns some mutable reference to the boxed value if it is of type `T`, or
     /// `None` if it isn't.
     #[inline]
+    #[allow(unsafe_code)]
     pub fn downcast_mut<T: Reflect + 'static>(&mut self) -> Option<&mut T> {
         if self.is::<T>() {
             unsafe {

components/devtools/lib.rs

@@ -20,6 +20,7 @@
 #![plugin(serde_macros)]
 
 #![allow(non_snake_case)]
+#![deny(unsafe_code)]
 
 #[macro_use]
 extern crate log;

components/devtools_traits/lib.rs

@@ -10,6 +10,8 @@
 #![crate_type = "rlib"]
 
 #![allow(non_snake_case)]
+#![deny(unsafe_code)]
+
 #![feature(custom_derive, plugin)]
 #![plugin(serde_macros)]