Freeze managed state before launch.

lib/Cargo.toml

@@ -22,8 +22,8 @@ yansi = "0.4"
 log = "0.3"
 url = "1"
 toml = "0.4.2"
-num_cpus = "1"
-state = "0.4"
+num_cpus = "1.0"
+state = "0.4.1"
 time = "0.1"
 memchr = "1"
 base64 = "0.6"

lib/src/rocket.rs

@@ -672,6 +672,9 @@ impl Rocket {
                 Err(e) => return LaunchError::from(e)
             }
 
+            // Freeze managed state for synchronization-free accesses later.
+            self.state.freeze();
+
             // Run the launch fairings.
             self.fairings.handle_launch(&self);