[webkit-reviews] review requested: [Bug 21141] REGRESSION: Exception messages for user entered commands are poor : [Attachment 23890] Fix ye olde instanceof

[bugzilla-daemon at webkit.org]

Oliver Hunt <oliver at apple.com> has asked  for review:
Bug 21141: REGRESSION: Exception messages for user entered commands are poor
https://bugs.webkit.org/show_bug.cgi?id=21141

Attachment 23890: Fix ye olde instanceof
https://bugs.webkit.org/attachment.cgi?id=23890&action=edit