From e40961df12f4edeee6c69250bfa9e9e8da09f37d Mon Sep 17 00:00:00 2001
From: Atlante45 <clement.brisset@gmail.com>
Date: Sun, 14 Dec 2014 21:34:27 -0800
Subject: [PATCH] Checking that T is in fact derived from Dependency

---
 libraries/shared/src/DependencyManager.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libraries/shared/src/DependencyManager.h b/libraries/shared/src/DependencyManager.h
index 2a81941b8a..87c7c7b4a6 100644
--- a/libraries/shared/src/DependencyManager.h
+++ b/libraries/shared/src/DependencyManager.h
@@ -16,6 +16,7 @@
 #include <QString>
 
 #include <typeinfo>
+#include <assert.h>
 
 class DependencyManager {
 public:
@@ -56,7 +57,9 @@ T* DependencyManager::get() {
 
     // Found no instance in hash so we create one.
     T* newInstance = new T();
-    getInstanceHash().insert(typeId, dynamic_cast<Dependency*>(newInstance));
+    instance = dynamic_cast<Dependency*>(newInstance);
+    assert(instance != NULL); // If this triggers, check that T is derived from Dependency
+    getInstanceHash().insert(typeId, instance);
     return newInstance;
 }