Compilation Exception - remove duplicated this on stack
 #KT-3114 Fixed
KT-880 Overload resolution ambiguity

 #KT-880 Fixed
KT-1998 Strange "Overload resolution ambiguity"

 #KT-1998 Fixed
Remove dangling commas from generated tests
Remove extension toArray()
Assertion fixed
Make sure that the class object class is not accessible from Kotlin
Common functionality moved up
Common code extracted to a method
Double-checked locking implementation fixed
Unused class deleted
LazyTypeParameterDescriptor made thread-safe
Lazy member scopes are now thread-safe.

NOTE: in this implementation there will be exceptions from rewrites on the trace.
Thread-safe lazy values introduced into LazyClassDescriptor
Thread-safe lazy values introduced into FilteringClassLikeInfo
StorageManager can create thread-safe memoized functions
Nullable lazy values and memoized functions supported
Thread-safe ScopeProvider
Migrating to memoized functions and nullable lazy values
createConcurrentMap() is no longer needed