OrderedMultiDict.addlist() silently drops values when passed a one-shot iterator

OrderedMultiDict.addlist() silently drops values when passed a one-shot iterator: a task in Repo2RLEnv R2E-Gym / SWEGEN (Harbor dataset). The docstring for addlist() says "tuples and other sequences and iterables work", but passing a one-shot iterator (such as iter( ... ) or a generator…