[Webkit-unassigned] [Bug 155251] New: Function parameter gets optimized away when used as the default of a named parameter only

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Mar 9 13:00:18 PST 2016


https://bugs.webkit.org/show_bug.cgi?id=155251

            Bug ID: 155251
           Summary: Function parameter gets optimized away when used as
                    the default of a named parameter only
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: OS X 10.11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: stefan at sechel.de

Define the following function:
f = function(a){ (function({aa = a}){ console.log('result: ' + aa); })({}); }

--------
f(42)
expected: 
result: 42
got: 
no log at all

--------
f(42)
f(42)
expected:
result: 42
result: 42
got:
result: 42

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