Passing `**dict(...)` to `functools.partial` confuses mypy

Bug Report

Something like partial(func, **dict(a=1)) confuses mypy which seems to expect the dictionary keys to contain all the arguments to func, leading to errors if positional arguments are not specified (see this playground / gist), or if only a few arguments are specified and later more as passed to partial's return value (see this playground / gist).

Expected Behavior

I realise that mypy cannot know what ends up in an untyped dictionary, but it should maybe just give up in this case.

Actual Behavior

See gist.

Your Environment

• Mypy version used: mypy 1.15.0 (compiled: yes), but also master while using the playground
• Mypy command-line flags: none
• Mypy configuration options from mypy.ini (and other config files): none
• Python version used: 3.10.1, but also 3.13 while using the playground

まず、リンク先の mypy playground と gist にある2つの例を、mypy 1.15.0 と master で再現します。functools.partial がアンパックされた辞書をどのように処理するかを追跡し、その後、報告されたケースで誤った診断が生成されなくなっている一方で、有効な partial 呼び出しは引き続きチェックされることを確認します。