Unable to use plugins in 0.920

[Apakottur]

Bug Report

I am using mypy plugins for libraries like pydantic and SQLAlchemy.

Attempting to upgrade mypy from 0.910 to 0.920 breaks when using any of those plugins.

To Reproduce

Create the two following files:

# test.py
def func(var: int) -> int:
    return var

# mypy.ini
[mypy]
plugins=pydantic.mypy

Install pydantic and mypy, and run mypy --config mypy.ini test.py

Expected Behavior

No issues are found.

Actual Behavior

I am getting the following error:

mypy.ini:2: error: Error importing plugin "pydantic.mypy": cannot import name 'TypeVarDef' from 'mypy.types' (***/python3.10/site-packages/mypy/types.cpython-310-x86_64-linux-gnu.so)
Found 1 error in 1 file (errors prevented further checking)

Your Environment

• Mypy version used: 0.920
• Python version used: 3.10.1

[arnimarj]

An issue has been created for pydantic: pydantic/pydantic#3528

[Apakottur]

Awesome, closing this one then.