# Regression fixture: a tainted value is appended to a list and later
# read back via subscript before being sunk.  This exercises container-
# element taint — a known heap-aliasing limitation.
#
# Cross-function container identity is expected to close this gap.
# For now the fixture is codified as a known-gap coverage test.
import os
import subprocess

items = []
items.append(os.environ["INPUT"])
subprocess.run(items[0], shell=True)