Fix unpickling of dynamic subclasses of ConfigToolDependency

This code isn't used as present: the actual objects we use and which get
pickled are either static subclasses of ConfigToolDependency, or special
purpos subclasses of Dependency which get attributes copied from an instance
of a dynamic subclass of ConfigToolDependency which is then discarded.

This is fortunate, as it doesn't work: the pickled reduction is a call to
the dynamic subclass's constructor, but the superclass constructors rely on
the environment object being fully initialized, which hasn't happened yet
during unpickling.

Avoid this by having a pickled reduction which is just a call to create the
dynamic subclass object, and relying on the default __setstate__ behavior to
unpickle the object's __dict__.

0 files changed, 0 insertions, 0 deletions