This however makes testLocalFunctionName fail because currently
isSubclassOf (incorrectly) returns false and therefore an anonymous
class is generated and the name is taken from there. The name there is
"box$OK" which is incorrect. The isSubclassOf issue is KT-28198 and will
be fixed separately; the incorrect name issue will be investigated later
Anonymous classes for local function references implement their
getOwner() as "return null" currently (KT-14291). To avoid NPE in this
case, we now consider two local functions the same if their name and
signature are equal. This is incorrect in general, but unlikely to cause
major problems and is going to be fixed by KT-14291 eventually anyway
#KT-17055
Alexander Udalov