[Webkit-unassigned] [Bug 159930] REGRESSION (r203348-r203368): ASSERTION FAILED: from.isCell() && from.asCell()->JSCell::inherits(std::remove_pointer<To>::type::info())

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159930

--- Comment #3 from Filip Pizlo <fpizlo at apple.com> ---
Wow this looks like a long-standing bug with how we read the scope register.  We're assuming that it's boxed on 32-bit, which won't be true in the DFG.

I believe that we would have gotten this crash in debug 32-bit debugger tests if those tests tried hard enough.

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