[Webkit-unassigned] [Bug 26904] New: Suppress 'undefined' in JSC program display

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=26904

           Summary: Suppress 'undefined' in JSC program display
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Trivial
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bfulgham at webkit.org


If you play with the JSC program, you can perform various calculations and see
results:
> 1 + 2
3
> "hello"
hello

The problem is if you attempt to create a variable binding, which does not
return a value.  In this case, the JSC program reports 'undefined', which is a
surprising result and might confuse a user into thinking an error has occurred.
 For example:

> var add2 = function(arg) { return arg + 2; }
undefined
> add2(15)
17

It seems like it would be better if the transcript looked like the following:
> 1 + 2
3
> var add3 = function(arg) { return arg + 3; }
> add3(15)
18


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