[Webkit-unassigned] [Bug 146621] New: JSC's parser should follow the ES6 spec with respect to parsing Declarations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146621

            Bug ID: 146621
           Summary: JSC's parser should follow the ES6 spec with respect
                    to parsing Declarations
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: saambarati1 at gmail.com
                CC: basile_clement at apple.com, fpizlo at apple.com,
                    ggaren at apple.com, mark.lam at apple.com,
                    msaboff at apple.com, oliver at apple.com, rniwa at webkit.org,
                    utatane.tea at gmail.com

There are probably a few places where JSC messes up. Notably:

if (b)
    class C { . }

Should not be allowed. 
Parsing a class is not part of a Statement, rather, it is part of a StatementListItem.
StatementListItem = Statement || Declaration
Here is the relevant grammar:
https://people.mozilla.org/~jorendorff/es6-draft.html#sec-statements

There are probably other places where the parser messes up.

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