There is a typo in r37433 that leads to a significant number of JSC test failures when using the bytecode interpreter. I can't finish running the tests without quitting and continuing the driver after each one. I unfortunately figured this out while spending a few hours reducing and chasing down bug 21459 in bytecode.
Created attachment 24222 [details]
Comment on attachment 24222 [details]
Landed in r37441.
Oops. Sorry. Thanks!