Assigning a dict literal to a list variable in a function raises no issue

[trevor-e-apple]

Bug Report

(A clear and concise description of what the bug is.)

To Reproduce

The following code reproduces the issue

from typing import List

class Foo():
	def __init__(self):
		pass

def test_make_update_sql_multiple():
    where_args: List[Foo] = {"any": "thing"}
    print(where_args)

Expected Behavior

The following code produces the expected behavior (raise an error with assigning a dict to a List)

from typing import List

class Foo():
	def __init__(self):
		pass

where_args: List[Foo] = {"any": "thing"}
print(where_args)

Actual Behavior

Mypy sees no problem

Your Environment

• Mypy version used: 0.931
• Mypy command-line flags: None
• Mypy configuration options from mypy.ini (and other config files): N/A
• Python version used: 3.9.5
• Operating system and version: Windows 10.0.19044 Build 19044

[JelleZijlstra]

https://mypy.readthedocs.io/en/stable/common_issues.html#no-errors-reported-for-obviously-wrong-code

[erictraut]

Has there been any thought of enabling "--check-untyped-defs" by default? Someone seems to trip on this at least once a week.

[JelleZijlstra]

Yes, I agree the current behavior is not at all intuitive. #11201 lists it as a possible change.