[Webkit-unassigned] [Bug 34170] [Qt] Javascript undefined > 0 returns true on Symbian

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=34170





--- Comment #6 from Kent Hansen <kent.hansen at nokia.com>  2010-01-27 07:15:50 PST ---
(In reply to comment #5)
> insanity check Number.NaN > 0 returns true. Looks like we have a winner.

So did the Open C guys respond regarding numeric_limits<double>::quiet_NaN()
being buggy?

Here's a quick work-around for Qt you might want to try in
JSValue::nonInlineNaN:

#if PLATFORM(QT)
    return qQNaN();
#endif

qQNaN and friends are declared in src/corelib/global/qnumeric.h.

I wonder why JSValue is the only place that depends on
numeric_limits<double>::quiet_NaN? There's code near the top of JSCell.cpp that
constructs NaN and Infinity from raw bits if necessary. It's basically what the
qnumeric implementation does as well (see qnumeric_p.h).
Maybe the robust fix would be to make the distinction between quiet NaN and
signaling NaN in that code, and change JSValue to use that constant.

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