Missing line number error report

[eliegoudout]

Hi there,

I wanted to know if someone already had this: I have error with no line number, so I don't really know how to debug them. For example, you can this failing pipeline which shows

paramclasses/paramclasses.py: error: Incompatible types in assignment (expression has type "object", variable has type "list[object]")  [assignment]
paramclasses/paramclasses.py: error: Incompatible types in assignment (expression has type "object", variable has type "dict[str, object]")  [assignment]

It's not "global", as before I had errors with and without line numbers

paramclasses/paramclasses.py: error: Incompatible types in assignment (expression has type "object", variable has type "list[Any]")  [assignment]
paramclasses/paramclasses.py: error: Incompatible types in assignment (expression has type "object", variable has type "dict[Any, Any]")  [assignment]
paramclasses/paramclasses.py:272: error: "type" has no attribute "__post_init__"; maybe "__init__"?  [attr-defined]
paramclasses/paramclasses.py:528: error: Need type annotation for "args" (hint: "args: list[<type>] = ...")  [var-annotated]
...

Thanks in advance!
Élie

[eliegoudout]

After invstigation, I know it comes from the following code:

https://github.com/eliegoudout/paramclasses/blob/902eb276f3046457b9f09ef23a42e2e1ecb897e9/paramclasses/paramclasses.py#L539-L548

Of course, I understand the errors, but I don't really know why there are no lines!

Note however that

# type: ignore[assignment]  # Not statically checked

does not silence the errors!

[brianschubert]

Simplified reproducer:

a: list[int]
b: str
(b,) = (*a,)

outputs:

main.py: error: Incompatible types in assignment (expression has type "int", variable has type "str")  [assignment]

[eliegoudout]

Thanks for finding a MWE. I think you could also add the # type: ignore[assignment] to complete it (after double-checking, i'm currently unable to, writing from my phone).