hotspot/src/share/vm/runtime/sharedRuntime.cpp:1214:48: error: ‘class klassOopDesc’ has no member named ‘is_linked’; did you mean ‘is_locked’?
assert(callee_method->method_holder()->is_linked(), "must be");

assert was missed when testing with a product build, but it needs to be cast on OpenJDK 7 using instanceKlass::cast, as was done with other instances in this backport.