fresh variables on each iteration in nested loop and generator syntax #26483
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On the plus side, I get to close a 3-digit issue. On the minus side, that is some grödy lowering 😁
I think these cases are rare enough that we can live without a deprecation. It's a small miracle that the deprecation for the other loop scope change still works with this. But there is a strange interaction: for all but the innermost loop variable, you can still get scope deprecation warnings, but you can't assign to the outer variable from the loop body (unless it's declared
outer).fixes #330