build: build 2.5.7

dist/vue.common.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1933,7 +1933,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4870,16 +4870,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4968,7 +4973,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 
@@ -9262,6 +9267,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -10302,9 +10316,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -10362,9 +10373,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 

dist/vue.esm.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1931,7 +1931,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4868,16 +4868,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4966,7 +4971,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 
@@ -9260,6 +9265,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -10300,9 +10314,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -10360,9 +10371,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 

dist/vue.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1937,7 +1937,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4859,16 +4859,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4957,7 +4962,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 
@@ -9251,6 +9256,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if ("development" !== 'production' && el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -10291,9 +10305,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -10351,9 +10362,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 

dist/vue.runtime.common.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1906,7 +1906,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4866,16 +4866,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4964,7 +4969,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 

dist/vue.runtime.esm.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1904,7 +1904,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4864,16 +4864,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4962,7 +4967,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 

dist/vue.runtime.js

@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.5.6
+ * Vue.js v2.5.7
  * (c) 2014-2017 Evan You
  * Released under the MIT License.
  */
@@ -1910,7 +1910,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -4855,16 +4855,21 @@ var KeepAlive = {
     if (componentOptions) {
       // check pattern
       var name = getComponentName(componentOptions);
-      if (!name || (
-        (this.exclude && matches(this.exclude, name)) ||
-        (this.include && !matches(this.include, name))
-      )) {
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
         return vnode
       }
 
-      var ref = this;
-      var cache = ref.cache;
-      var keys = ref.keys;
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
       var key = vnode.key == null
         // same constructor may get registered as different local components
         // so cid alone is not enough (#3269)
@@ -4953,7 +4958,7 @@ Object.defineProperty(Vue$3.prototype, '$ssrContext', {
   }
 });
 
-Vue$3.version = '2.5.6';
+Vue$3.version = '2.5.7';
 
 /*  */
 

packages/vue-server-renderer/basic.js

@@ -4027,6 +4027,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if ("development" !== 'production' && el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -5584,9 +5593,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -5644,9 +5650,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 
@@ -6089,7 +6104,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {

packages/vue-server-renderer/build.js

@@ -3766,6 +3766,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -5323,9 +5332,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -5383,9 +5389,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 
@@ -5828,7 +5843,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
     return
   }
   if (val.__ob__) {
@@ -8466,7 +8481,7 @@ function compileModule (files, basedir, runInNewContext) {
       : script.runInNewContext(sandbox);
     var m = { exports: {}};
     var r = function (file) {
-      file = path$2.join('.', file);
+      file = path$2.posix.join('.', file);
       if (files[file]) {
         return evaluateModule(file, sandbox, evaluatedFiles)
       } else if (basedir) {

packages/vue-server-renderer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-server-renderer",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "description": "server renderer for Vue 2.0",
   "main": "index.js",
   "types": "types/index.d.ts",

packages/vue-template-compiler/browser.js

@@ -3097,6 +3097,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if ("development" !== 'production' && el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -4307,9 +4316,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -4367,9 +4373,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 

packages/vue-template-compiler/build.js

@@ -2699,6 +2699,15 @@ function processSlot (el) {
       }
       el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
     } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          true
+        );
+      }
       el.slotScope = slotScope;
     }
     var slotTarget = getBindingAttr(el, 'slot');
@@ -3909,9 +3918,6 @@ var unaryOperatorsRE = new RegExp('\\b' + (
   'delete,typeof,void'
 ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// check valid identifier for v-for
-var identRE = /[A-Za-z_$][\w$]*/;
-
 // strip strings in expressions
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
@@ -3969,9 +3975,18 @@ function checkFor (node, text, errors) {
   checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
 }
 
-function checkIdentifier (ident, type, text, errors) {
-  if (typeof ident === 'string' && !identRE.test(ident)) {
-    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  errors
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident));
+    } catch (e) {
+      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+    }
   }
 }
 

packages/vue-template-compiler/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-template-compiler",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "description": "template compiler for Vue 2.0",
   "main": "index.js",
   "unpkg": "browser.js",