fix a big typo
diff --git a/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Plugin.java b/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Plugin.java
index a9e2374..acc9aff 100644
--- a/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Plugin.java
+++ b/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Plugin.java
@@ -749,7 +749,7 @@
 	 * @since 3.0
 	 */
 	public void stop(BundleContext context) throws Exception {
-		context = null;
+		this.context = null;
 	}
 	
 	/**