Because.
Created attachment 44650 [details] The patch
style-queue ran check-webkit-style on attachment 44650 [details] without any errors.
Transmitting file data ..... Committed revision 51975.
Comment on attachment 44650 [details] The patch Rolled out in http://trac.webkit.org/changeset/51978. This broke fast/js/exception-sequencing-binops.html
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Gah, missed that, cheers Adam.
Transmitting file data ...... Committed revision 52026.
relanded fixed.