scala/pickling — pull request #134 by phaller (2014-05-20 11:17:21+00:00)
Title: Handle sealed classes in check for non-cyclic types

When deciding to delay the initialization of fields due to
possible cycles, sealed classes were not handled. This could
cause issues, such as #128, where the initialization of
a constructor parameter was delayed and thus the parameter
was null during the execution of the constructor.