[3.12] gh-104271: Fix auto() fallback in case of mixed type Enum #104279
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gh-91457 changed the behavior of
auto()
in case of mixed type Enums.the fallback behavior (before deprecation) was supposed to be backwards compatible (I think), but iterating the sorted
last_values
in order (instead of reversed order) results an incorrect behavior of always reusing values after the firstauto()
, as demonstrated in the test case I extended in this PR.