Constraint solver limitation known problem test and a workaround #503
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This is modelled after the same error in gradualizer_db:collects_specs/2.
erszcz
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This documents a limitation of the constraint solver using intersection typed functions' return values as lower bounds, which leads to false positives. It's a tricky case, but I tried to describe it in the added test case. I'm not sure yet if it's possible to fix it with the current solver implementation.