Looks like strings generated by StaticString.pm don't actually get the static flag set on them.
Created attachment 252222 [details] Patch
Comment on attachment 252222 [details] Patch Clearing flags on attachment: 252222 Committed r183722: <http://trac.webkit.org/changeset/183722>
All reviewed patches have been landed. Closing bug.
This made all the tests assert: https://build.webkit.org/results/Apple%20Mavericks%20Debug%20WK1%20(Tests)/r183722%20(12448)/results.html
Re-opened since this is blocked by bug 144534