- Fix bug while refactoring HotModuleReplacementPlugin as suggested in PR

Author: Kyle Truong

lib/HotModuleReplacementPlugin.js

@@ -153,7 +153,7 @@ module.exports = class HotModuleReplacementPlugin {
 				const buf = [source];
 				buf.push("");
 				buf.push("// __webpack_hash__");
-				buf.push(`${this.requireFn}.h = () => hotCurrentHash`);
+				buf.push(this.requireFn + ".h = function() { return hotCurrentHash; };");
 				return this.asString(buf);
 			});