[Webkit-unassigned] [Bug 160322] Undefined Behavior in JSValue cast from NaN

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=160322

--- Comment #5 from Keith Miller <keith_miller at apple.com> ---
I think JSValue(double) is fine. While the cast from double -> int32 is undefined, we only use the int32 if, when cast back to a double it's the same as the original value. As long as the undefinedness of the double -> int32 cast doesn't do anything too crazy, like corrupt memory or other variables, which I think we can rely on, that code should be safe. Perhaps my trust in the saneness of double -> int32 is unfounded.

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