Created attachment 449984 [details] [diff] [review] Implement JSOP_LENGTH. Implements the slow path for JSOP_LENGTH in terms of JSOP_GETPROP. Depends on the JSOP_CALLPROP patch, which adds the static function InlineGetProp() that is necessary here. No new failures.
Note that in the CALLPROP bug if you change InlineGetProp to propagate the return value and not THROW, then this patch needs a slight tweak after.