NEW 159869
Built-in generator should support default value for function parameters 
https://bugs.webkit.org/show_bug.cgi?id=159869
Summary Built-in generator should support default value for function parameters
youenn fablet
Reported 2016-07-18 00:20:09 PDT
See ReadableStream.pipeTo for instance
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youenn fablet
Comment 1 2016-07-18 00:21:25 PDT
For ReadableStream.pipeTo, the second parameter is optional, the function length should be 1, while it is 2 if we define the second parameter in the function signature.
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