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[mypyc] Evaluate args in correct order when builtin takes a genexpr - #22214
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When a generator expression is passed to sum(), min() or another builtin that mypyc has special handling for, match CPython's order of evaluation.
p-sawicki
approved these changes
Oct 16, 2026
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| try: | ||
| sum((elt(x) for x in it()), fail()) | ||
| except ValueError: | ||
| pass | ||
| check(["iterable", "fail"]) | ||
| try: | ||
| next((elt(x) for x in it()), fail()) | ||
| except ValueError: | ||
| pass | ||
| check(["iterable", "fail"]) | ||
| try: | ||
| max((elt(x) for x in it()), key=fail()) | ||
| except ValueError: | ||
| pass | ||
| check(["iterable", "fail"]) |
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use assertRaises here? theoretically this could pass without raising.
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When a generator expression is passed to sum(), min() or another builtin that mypyc has special handling for, match CPython's order of evaluation.