Merge pull request #7655 from skratchdot/issue-7654

prevent UnhandledPromiseRejectionWarning in node 6

lib/debug/ProfilingPlugin.js

@@ -137,7 +137,7 @@ const createTrace = outputPath => {
 				callback();
 			});
 			// Tear down the readable trace stream.
-			trace.destroy();
+			trace.push(null);
 		}
 	};
 };