Crash on namedtuple + @dataclass #18527
Description
Crash Report
running under python 3.13.1 results in the following crash when it does not crash under 3.12.8
Traceback
Traceback (most recent call last):
File "<redacted>/.venv/bin/mypy", line 8, in <module>
sys.exit(console_entry())
~~~~~~~~~~~~~^^
File "<redacted>/.venv/lib/python3.13/site-packages/mypy/__main__.py", line 15, in console_entry
main()
~~~~^^
File "mypy/main.py", line 109, in main
File "mypy/main.py", line 193, in run_build
File "mypy/build.py", line 194, in build
File "mypy/build.py", line 269, in _build
File "mypy/build.py", line 2940, in dispatch
File "mypy/build.py", line 3338, in process_graph
File "mypy/build.py", line 3433, in process_stale_scc
File "mypy/semanal_main.py", line 99, in semantic_analysis_for_scc
File "mypy/semanal_main.py", line 443, in apply_class_plugin_hooks
File "mypy/semanal_main.py", line 479, in apply_hooks_to_class
File "mypy/plugins/dataclasses.py", line 966, in dataclass_class_maker_callback
File "mypy/plugins/dataclasses.py", line 389, in transform
File "mypy/plugins/dataclasses.py", line 409, in _add_dunder_replace
File "mypy/plugins/common.py", line 238, in add_method_to_class
File "mypy/plugins/common.py", line 315, in _prepare_class_namespace
ValueError: list.remove(x): x not in list
To Reproduce
mypy <source dir>
Your Environment
This error occurs on a large proprietary code base. I have removed all custom configuration options and plugins normally specified in pyproject.toml, cleaned .mypy_cache dir and reproduced the error with a vanilla mypy invocation. No crash when using python 3.12.8, but traceback above occurs when switching to python 3.13.1
- Mypy version used: 1.14.1
- Mypy command-line flags: none
- Mypy configuration options from
mypy.ini(and other config files): none - Python version used: tested successfully under python 3.12.8, fails under 3.13.1
- Operating system and version: OS X Sequoia