# fixhunt regression fixture: ruff UP038, ruff 0.17.1
# the fix crashed the tool on this program
# before the fix: no stdout, stderr "TypeError: Subscripted generics cannot be used with class and instance checks", exit 1
# finding 2026-10-17T21-20-52-142Z-httm-ruff-UP038/r2-p001; rule fired 0 time(s) before the fix

from typing import List
x = [1]
print(isinstance(x, (List[int],)))