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Changes between Initial Version and Version 1 of Ticket #31961

initial	v1
38	38	}}}
39	39
40		This is the same sort of problem described in #26665 and/or #11390. It's an obvious performance issue, but more than that, if can beak behavior if the callback is non-idempotent.
	40	This is the same sort of problem described in #26665 and/or #11390. It's an obvious performance issue, but more than that, it can beak behavior if the callback is non-idempotent.
41	41
42	42	I discovered this because I had patched my callback using unttest.mock to return a sequence of return values and got hard-to-diagnose test failures. Specifically, my test failed because it raised StopIteration when it ran out of values to return.