[Webkit-unassigned] [Bug 187386] Sometimes "x instanceof Worker" inappropriately returns false

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187386

--- Comment #3 from jdscheff at gmail.com ---
Can you be more specific about how messing with the prototype chain might cause this problem? Mostly just for my curiosity, since in my app I already switched from relying on "instanceof Worker" to be correct.

Also it's curious because this error only appears in my error tracker for Safari, not any other browser. And while I do have a little third party JS running, it's not much. It'd be weird if something like Google Analytics was destructively messing with built in prototypes.

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