fix build

package.json

@@ -18,8 +18,9 @@
   },
   "devDependencies": {
     "babel-eslint": "^7.1.1",
-    "babel-preset-es2015": "^6.24.0",
     "babel-plugin-transform-object-assign": "^6.22.0",
+    "babel-plugin-yo-yoify": "^0.4.0",
+    "babel-preset-es2015": "^6.24.0",
     "babelify": "^7.3.0",
     "browserify": "^13.0.1",
     "ethereum-common": "0.0.18",
@@ -40,7 +41,7 @@
     "yo-yoify": "^3.1.0"
   },
   "scripts": {
-    "build": "mkdirp build; browserify src/index.js > build/app.js",
+    "build": "mkdirp build; browserify src/index.js > build/app.js -d",
     "lint": "standard | notify-error",
     "nightwatch_local": "nightwatch --config nightwatch.js --env local",
     "nightwatch_remote_chrome": "nightwatch --config nightwatch.js --env chrome",
@@ -81,23 +82,60 @@
     ],
     "parser": "babel-eslint"
   },
+  "babel": {
+    "plugins": [
+      "transform-es2015-template-literals",
+      "transform-es2015-literals",
+      "transform-es2015-function-name",
+      "transform-es2015-arrow-functions",
+      "transform-es2015-block-scoped-functions",
+      "transform-es2015-classes",
+      "transform-es2015-object-super",
+      "transform-es2015-shorthand-properties",
+      "transform-es2015-duplicate-keys",
+      "transform-es2015-computed-properties",
+      "transform-es2015-for-of",
+      "transform-es2015-sticky-regex",
+      "transform-es2015-unicode-regex",
+      "check-es2015-constants",
+      "transform-es2015-spread",
+      "transform-es2015-parameters",
+      "transform-es2015-destructuring",
+      "transform-es2015-block-scoping"
+    ]
+  },
   "browserify": {
     "transform": [
-      ["babelify", {
-        "plugins": [
-          ["fast-async", {
-            "runtimePatten": null,
-            "compiler": {
-              "promises": true,
-              "es7": true,
-              "noRuntime": true,
-              "wrapAwait": true
-            }
-          }], "transform-object-assign"
-        ]
-      }],
-      ["yo-yoify"],
-      ["babelify", { "presets": ["es2015"] }]
+      [
+        "babelify",
+        {
+          "sourceMapsAbsolute": false,
+          "sourceMaps": true,
+          "plugins": [
+            [
+              "fast-async",
+              {
+                "runtimePattern": null,
+                "compiler": {
+                  "es7": true,
+                  "noRuntime": true,
+                  "promises": true,
+                  "wrapAwait": true
+                }
+              }
+            ],
+            [
+              "yo-yoify"
+            ],
+            [
+              "transform-object-assign"
+            ]
+          ],
+          "presets": [
+            "es2015"
+          ]
+        }
+      ]
     ]
   }
 }

src/web3Provider/web3VmProvider.js

@@ -158,7 +158,7 @@ web3VmProvider.prototype.storageRangeAt = function (blockNumber, txIndex, addres
   if (this.storageCache[txIndex] && this.storageCache[txIndex][address]) {
     var storage = this.storageCache[txIndex][address]
     return cb(null, {
-      storage: Object.assign({}, storage),
+      storage: JSON.parse(JSON.stringify(storage)),
       nextKey: null
     })
   } else {