The global this object has a structure that has a null global object. That makes sense since there is no one global object that the structure could be associated with. But what doesn't make sense is that this leads to the inheritorID structure created for objects that have the global this object as their prototype also having a null global object, which then results in hilarity and badness when any operation is performed on those objects that expects to be able to query the global object via the structure.
Created attachment 137615 [details]
Created attachment 137616 [details]
Attachment 137616 [details] did not pass style-queue:
Total errors found: 2 in 7 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 137616 [details]
Attachment 137616 [details] did not pass win-ews (win):
Landed in http://trac.webkit.org/changeset/114457
Windows build fix: http://trac.webkit.org/changeset/114459