Bug 170872 – test262: test262/test/language/global-code/new.target-arrow.js

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Joseph Pecoraro]

Test:
test262/test/language/global-code/new.target-arrow.js

Reduction:
js> () => { new.target }
  => should throw a Syntax Error

Spec:

Scripts - 15.1.1 Static Semantics: Early Errors
https://tc39.github.io/ecma262/#sec-scripts-static-semantics-early-errors

> It is a Syntax Error if StatementList Contains NewTarget unless the source code
> containing NewTarget is eval code that is being processed by a direct eval.
> Additional early error rules for NewTarget in direct eval are defined in 18.2.1.1.

Modules - 15.2.1.1 Static Semantics: Early Errors
https://tc39.github.io/ecma262/#sec-module-semantics-static-semantics-early-errors

> It is a Syntax Error if ModuleItemList Contains NewTarget.

Arrow Functions - 14.2.3 Static Semantics: Contains
https://tc39.github.io/ecma262/#sec-arrow-function-definitions-static-semantics-contains

> With parameter symbol.
> 
>   ArrowFunction : ArrowParameters = ConciseBody
> 
> 1. If symbol is not one of NewTarget, SuperProperty, SuperCall, super or this, return false.
> 2. If ArrowParameters Contains symbol is true, return true.
> 3. Return ConciseBody Contains symbol.

Notes
• Chrome and Firefox throw a Syntax Error

[Joseph Pecoraro]

Created attachment 307182 [details]
[PATCH] Proposed Fix

[Build Bot]

Comment on attachment 307182 [details]
[PATCH] Proposed Fix

Attachment 307182 [details] did not pass jsc-ews (mac):
Output: http://webkit-queues.webkit.org/results/3537869

New failing tests:
stress/arrowfunction-lexical-bind-newtarget.js.no-cjit-validate-phases
stress/arrowfunction-lexical-bind-newtarget.js.no-ftl
stress/arrowfunction-lexical-bind-newtarget.js.dfg-maximal-flush-validate-no-cjit
stress/arrowfunction-lexical-bind-newtarget.js.ftl-no-cjit-no-inline-validate
stress/arrowfunction-lexical-bind-newtarget.js.dfg-eager
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-no-cjit-b3o1
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-no-cjit-no-put-stack-validate
stress/arrowfunction-lexical-bind-newtarget.js.ftl-no-cjit-small-pool
stress/arrowfunction-lexical-bind-newtarget.js.ftl-eager
stress/async-arrow-functions-lexical-new.target-binding.js.default
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-no-cjit-no-inline-validate
stress/async-arrow-functions-lexical-new.target-binding.js.dfg-eager-no-cjit-validate
stress/arrowfunction-lexical-bind-newtarget.js.ftl-no-cjit-no-put-stack-validate
stress/async-arrow-functions-lexical-new.target-binding.js.no-ftl
stress/arrowfunction-lexical-bind-newtarget.js.no-llint
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-eager-no-cjit-b3o1
stress/arrowfunction-lexical-bind-newtarget.js.ftl-eager-no-cjit
stress/async-arrow-functions-lexical-new.target-binding.js.no-cjit-validate-phases
stress/async-arrow-functions-lexical-new.target-binding.js.dfg-eager
stress/arrowfunction-lexical-bind-newtarget.js.ftl-eager-no-cjit-b3o1
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-no-cjit-validate-sampling-profiler
stress/async-arrow-functions-lexical-new.target-binding.js.dfg-maximal-flush-validate-no-cjit
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-no-cjit-small-pool
stress/arrowfunction-lexical-bind-newtarget.js.no-cjit-collect-continuously
stress/arrowfunction-lexical-bind-newtarget.js.dfg-eager-no-cjit-validate
stress/arrowfunction-lexical-bind-newtarget.js.ftl-no-cjit-b3o1
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-eager
stress/async-arrow-functions-lexical-new.target-binding.js.ftl-eager-no-cjit
ChakraCore.yaml/ChakraCore/test/es6/globalLambdaNewTargetSyntaxError.js.default
stress/async-arrow-functions-lexical-new.target-binding.js.no-llint
stress/arrowfunction-lexical-bind-newtarget.js.default
stress/async-arrow-functions-lexical-new.target-binding.js.no-cjit-collect-continuously
stress/arrowfunction-lexical-bind-newtarget.js.ftl-no-cjit-validate-sampling-profiler

[Joseph Pecoraro]

Created attachment 307202 [details]
[PATCH] Proposed Fix

• Rebaselined now passing ChakaCore test
• Corrected stress tests + expanded our coverage in stress for this
• Corrected the patch for eval cases inside of functions

[Saam Barati]

Comment on attachment 307202 [details]
[PATCH] Proposed Fix

Can you add a module test?

[Saam Barati]

r=me

[Build Bot]

Comment on attachment 307202 [details]
[PATCH] Proposed Fix

Attachment 307202 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/3541708

New failing tests:
webrtc/captureCanvas-webrtc.html

[Build Bot]

Created attachment 307203 [details]
Archive of layout-test-results from ews123 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews123  Port: ios-simulator-wk2  Platform: Mac OS X 10.11.6

[WebKit Commit Bot]

Comment on attachment 307202 [details]
[PATCH] Proposed Fix

Clearing flags on attachment: 307202

Committed r215395: <http://trac.webkit.org/changeset/215395>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.