586 B
586 B
Always list-cast the mngrs input to .trionics.gather_contexts() and ensure its size otherwise raise a ValueError.
Turns out that trying to pass an inline-style generator comprehension doesn't seem to work inside the async with expression? Further, in such a case we can get a hang waiting on the all-entered event completion when the internal mngrs iteration is a noop. Instead we always greedily check a size and error on empty input; the lazy iteration of a generator input is not beneficial anyway since we're entering all manager instances in concurrent tasks.