linux_kernel/scripts/kconfig/tests/preprocess/circular_expansion/__init__.py

# SPDX-License-Identifier: GPL-2.0
"""
Detect circular variable expansion.

If a recursively expanded variable references itself (eventually),
it should fail with an error message.
"""

def test(conf):
    assert conf.oldaskconfig() != 0
    assert conf.stderr_matches('expected_stderr')