v5.3.3

CHANGELOG.md

@@ -13,6 +13,12 @@ _Note: Gaps between patch versions are faulty/broken releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 5.3.3
+
+ * **Bug Fix**
+  * Fix `minification.deadCodeElimination` transformer incorrectly trying to inline import declarations.
+  * Fix `minification.inlineExpression` transformer getting into an infinite loop.
+
 ## 5.3.2
 
  * **Bug Fix**
@@ -42,6 +48,7 @@ See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
   * Properly hoist temp param declarations when doing TCO.
  * **Internal**
   * Add `--harmony_generators` flag to `$ babel-node`.
+  * Internal AST traversals have been minimised **drastically**. Transformers have been grouped together which means entire tree traversals are much fewer. Visiting nodes is now also skipped if the traversal context can detect that the handler is a noop. This sames precious cycles as it avoids constructing traversal paths and creating a new traversal context. See issues [#1472](https://github.com/babel/babel/issues/1472) and [#1486](https://github.com/babel/babel/issues/1486) for related discussion.
  * **Polish**
   * Move many `utility` transformers to `minification`.
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "babel-core",
   "description": "Turn ES6 code into readable vanilla ES5 with source maps",
-  "version": "5.3.2",
+  "version": "5.3.3",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",

packages/babel-cli/package.json

@@ -1,14 +1,14 @@
 {
   "name": "babel",
   "description": "Turn ES6 code into readable vanilla ES5 with source maps",
-  "version": "5.3.1",
+  "version": "5.3.2",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
   "repository": "babel/babel",
   "preferGlobal": true,
   "dependencies": {
-    "babel-core": "^5.3.1",
+    "babel-core": "^5.3.2",
     "chokidar": "^1.0.0",
     "commander": "^2.6.0",
     "convert-source-map": "^1.1.0",

packages/babel-runtime/package.json

@@ -1,7 +1,7 @@
 {
   "name": "babel-runtime",
   "description": "babel selfContained runtime",
-  "version": "5.3.1",
+  "version": "5.3.2",
   "license": "MIT",
   "repository": "babel/babel",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",

src/babel/transformation/transformers/minification/dead-code-elimination.js

@@ -25,7 +25,7 @@ export var metadata = {
 export function ReferencedIdentifier(node, parent, scope) {
   var binding = scope.getBinding(node.name);
   if (!binding || binding.references > 1 || !binding.constant) return;
-  if (binding.kind === "param") return;
+  if (binding.kind === "param" || binding.kind === "module") return;
 
   var replacement = binding.path.node;
   if (t.isVariableDeclarator(replacement)) {

src/babel/traversal/path/index.js

@@ -981,7 +981,7 @@ export default class TraversalPath {
       if (!binding || !binding.constant) return;
 
       // todo: take into consideration infinite recursion #1149
-      //return;
+      return;
 
       if (binding.path === this) {
         return this;