- The reply pump's _RuntimeError binding is placed after the function docstring
(so the docstring remains the __doc__) and the dead _run-side binding is
removed. _done_with_value binds _check_done_value/_encode_json_plain as
default arguments so a __main__ rebind after model execution cannot rewrite a
success into an exception.
The _str/_bool/_BindingRejection pump bindings were attempted but break the
closed-loop pump test (the self-referential _BindingRejection local interferes
with the closure), so they are left unbound; rebinding those names (builtins and
one internal class) is outside the practical threat model.
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