I have been getting this error on Features diff pages for some time, but the weird thing is it's intermittent:
> ( ! ) Fatal error: Call to a member function set_display() on a non-object in sites/all/modules/contrib/commerce/commerce.module on line 362
A backtrace shows this is coming from commerce_cart_block_view() trying to embed the view 'commerce_cart_block'.
Could this be because Features is doing something wacky with Views on these pages?