babylon - npm Package Compare versions

Comparing version 6.1.2 to 6.1.4

lib/parser/lval.js

@@ -225,6 +225,19 @@ /* @flow */
       if (checkClashes) {
-        if (checkClashes[expr.name]) {
+        // we need to prefix this with an underscore for the cases where we have a key of
+        // `__proto__`. there's a bug in old V8 where the following wouldn't work:
+        //
+        //   > var obj = Object.create(null);
+        //   undefined
+        //   > obj.__proto__
+        //   null
+        //   > obj.__proto__ = true;
+        //   true
+        //   > obj.__proto__
+        //   null
+        var key = "_" + expr.name;
+
+        if (checkClashes[key]) {
           this.raise(expr.start, "Argument name clash in strict mode");
         } else {
-          checkClashes[expr.name] = true;
+          checkClashes[key] = true;
         }
@@ -231,0 +244,0 @@ }

package.json

 {
   "name": "babylon",
-  "version": "6.1.2",
+  "version": "6.1.4",
   "description": "A JavaScript parser",
@@ -13,2 +13,5 @@ "author": "Sebastian McKenzie <[e-mail]>",
   },
+  "devDependencies": {
+    "babel-helper-fixtures": "^6.1.4"
+  },
   "bin": {
@@ -15,0 +18,0 @@ "babylon": "./bin/babylon.js"

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Total package byte prevSize

198588

increased by0.25%

Lines of code

5051

increased by0.24%

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Dev dependency count

1

increased byInfinity%

No dependency changes