mypy

d37c2be0 - Now `lambda` is counted as a valid context in `handle_cannot_determine_type` (#11215)

Now `lambda` is counted as a valid context in `handle_cannot_determine_type` (#11215) Closes #11212 Previously `mypy` was ignoring `lambda` scope in `handle_cannot_determine_type`. I guess it was done to fix some `lambda` related crashes. I've also noticed one crash with this new solution in existing test. I happened because when right `or` part is unreachable, there's not `binder.frame` for it. So, I've made a temporary scope of it.