Add 6.6.0 changelog [ci skip]
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Henry Zhu
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CHANGELOG.md
138
CHANGELOG.md
@ -13,6 +13,144 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
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See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
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## 6.6.0 (2016-02-29) "core-js 2, better error feedback"
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Whoo a :frog: leap day release!
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### exports.default fix
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We finally fixed both [T2817](https://phabricator.babeljs.io/T2817), [T6863](https://phabricator.babeljs.io/T6863) where using both `transform-es3-member-expression-literals` and `transform-es2015-modules-commonjs`!
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```js
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exports.default = {};
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// was not to transformed to
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exports["default"] = {};
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```
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You should be able to remove `es3ify` (a useful workaround for this issue). Thanks everyone for your patience, and much thanks to @loganfsmyth for the fix!
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### More helpful error messages
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- If you are using a .babelrc with babel 5 options that were removed (there is a specific message for each one)
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```bash
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# before
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ReferenceError: [BABEL] unknown: Unknown option: base.stage
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# now
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ReferenceError: [BABEL] unknown: Using removed Babel 5 option: base.stage
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- Check out the corresponding stage-x presets http://babeljs.io/docs/plugins/#presets
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# another example
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ReferenceError: [BABEL] unknown: Using removed Babel 5 option: base.externalHelpers
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- Use the `external-helpers` plugin instead. Check out http://babeljs.io/docs/plugins/external-helpers/
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```
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- If you are trying to use a babel 5 plugin
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```bash
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# before
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babel Plugin is not a function
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# now
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The object-assign Babel 5 plugin is being run with Babel 6.
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```
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### core-js
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- `core-js` was updated to `^2.1.0`.
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---
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#### New Feature
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* `babel-plugin-transform-es2015-duplicate-keys`, `babel-preset-es2015`
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* [#3280](https://github.com/babel/babel/pull/3280) Fixes [T2462](https://phabricator.babeljs.io/T2462), compile duplicate keys in objects to valid strict ES5. ([@AgentME](https://github.com/AgentME))
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`babel-plugin-transform-es2015-duplicate-keys` is a new plugin that is included in the es2015 preset. It was added since ES5 doesn't allow duplicate properties (it is valid in ES2015 strict mode however).
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It will compile objects with duplicate keys to computed properties, which can be compiled with the `transform-es2015-computed-properties` plugin.
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Example:
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```js
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// .babelrc
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{ "plugins": ["transform-es2015-duplicate-keys"] }
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// Input
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var x = { a: 5, "a": 6 };
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// Output
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var x = { a: 5, ["a"]: 6 };
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```
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#### Bug Fix
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* `babel-plugin-transform-es2015-modules-commonjs`, `babel-traverse`
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* [#3368](https://github.com/babel/babel/pull/3368) Fix the module plugin to properly requeue so the ES3 transforms can work. ([@loganfsmyth](https://github.com/loganfsmyth))
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* `babylon`
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* [#3355](https://github.com/babel/babel/pull/3355) Clean up babylon bundle to allow it to be re-bundled - Fixes [T6930](https://phabricator.babeljs.io/T6930). ([@loganfsmyth](https://github.com/loganfsmyth))
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* `babel-generator`
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* [#3358](https://github.com/babel/babel/pull/3358) Fix generator with empty token list and force a newline for line comments in concise mode. ([@gzzhanghao](https://github.com/gzzhanghao))
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* `babel-plugin-transform-es2015-parameters`
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* [#3249](https://github.com/babel/babel/pull/3249) Assignment to rest param element triggers error T6932. ([@jmm](https://github.com/jmm))
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```js
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// .babelrc
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{ plugins: ["transform-es2015-parameters"] }
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// Fixes an internal error with the code:
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function x (...items) {
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items[0] = 0;
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}
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```
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* `babel-helper-remap-async-to-generator`, `babel-plugin-transform-es2015-parameters`
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* [#3336](https://github.com/babel/babel/pull/3336) Fixes [T3077](https://phabricator.babeljs.io/T3077) (incorrect _arguments for async arrow functions with rest params). ([@erikdesjardins](https://github.com/erikdesjardins))
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```js
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// .babelrc
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{
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"plugins": ["external-helpers", "transform-es2015-parameters", "transform-async-to-generator"]
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}
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// Fixes an issue with using incorrect `arguments`
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var x = async (...rest) => {
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if (noNeedToWork) return 0;
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return rest;
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};
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```
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* `babel-plugin-transform-regenerator`, `babel-traverse`
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* [#3359](https://github.com/babel/babel/pull/3359) Queue regeneratorRuntime so it is transformed before Program#exit. ([@loganfsmyth](https://github.com/loganfsmyth))
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Fixes the `_regeneratorRuntime is not defined` error when using `transform-runtime`/`transform-regenerator` (this happened when using polyfillable code in `core-js`.
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* `babylon`
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* [#3356](https://github.com/babel/babel/pull/3356) Properly fail to parse >== and <== - Fixes [T2921](https://phabricator.babeljs.io/T2921). ([@loganfsmyth](https://github.com/loganfsmyth))
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* `babel-plugin-transform-es2015-block-scoping`
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* [#3346](https://github.com/babel/babel/pull/3346) Rename scope bindings during block scope transform. ([@schmod](https://github.com/schmod))
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#### Documentation
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* `babel-plugin-transform-regenerator`
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* [#3370](https://github.com/babel/babel/pull/3370) Adds repository field to babel-plugin-transform-regenerator. ([@siroky](https://github.com/siroky))
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* `babel-plugin-transform-object-set-prototype-of-to-assign`
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* [#3369](https://github.com/babel/babel/pull/3369) fix babel-plugin-transform-proto-to-assign readme url. ([@tiemevanveen](https://github.com/tiemevanveen))
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* `babel-cli`
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* [#3357](https://github.com/babel/babel/pull/3357) Fix typo: sorucemap -> sourcemap. ([@forivall](https://github.com/forivall))
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#### Internal
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* [#3378](https://github.com/babel/babel/pull/3378) Remove Flow annotations and pragmas. ([@samwgoldman](https://github.com/samwgoldman))
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* [#3361](https://github.com/babel/babel/pull/3361) Switch to kcheck*, fix some lint rules. ([@kittens](https://github.com/kittens))
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* `babel-plugin-transform-runtime`, `babel-polyfill`, `babel-register`, `babel-runtime`
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* [#3340](https://github.com/babel/babel/pull/3340) update core-js. ([@zloirock](https://github.com/zloirock))
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#### Polish
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* `babel-core`, `babel-traverse`
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* [#3365](https://github.com/babel/babel/pull/3365) Replace arrow expression body with block statement. ([@jridgewell](https://github.com/jridgewell))
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* `babel-core`
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* [#3362](https://github.com/babel/babel/pull/3362) Show a better error when trying to use a babel 5 plugin. ([@hzoo](https://github.com/hzoo))
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* `babel-core`
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* [#3377](https://github.com/babel/babel/pull/3377) Give specific error messages for babel 5 options that were removed in babel 6. ([@hzoo](https://github.com/hzoo))
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---
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We have 15 committers this release!
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Thanks to: AgentME, clayreimann, erikdesjardins, forivall, gzzhanghao, hzoo, jmm, jridgewell, kittens, loganfsmyth, samwgoldman, schmod, siroky, tiemevanveen, zloirock
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## 6.5.2 (2016-02-12) "Who needs semicolons anyway” ¯\\_(ツ)_/¯
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Changes to note:
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