Assertion failure in Objects/codeobject.c advance_with_locations

[YuanchengJiang]

Crash report

What happened?

import dis
import io
import types
import contextlib
import unittest
class DisTests(unittest.TestCase):
        def f(x):
            return x + 1
        code = f.__code__
        try:
            new_code = code.replace(co_linetable=b'\xa0\xa1')
        except (AttributeError, TypeError, ValueError):
            self.skipTest("code.replace(co_linetable=...) not supported on this Python build")
        fn = types.FunctionType(new_code, f.__globals__, name=f.__name__,
                                argdefs=f.__defaults__, closure=f.__closure__)
        buf = io.StringIO()
        with contextlib.redirect_stdout(buf):
            dis.dis(fn)

python: ../Objects/codeobject.c:1225: advance_with_locations: Assertion `(second_byte & 128) == 0' failed.
Aborted (core dumped)

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

No response

[serhiy-storchaka]

When you play with the code object, you are responsible to support its consistency.