Jun 21, 2025 · Jun 21, 2025
diff --git a/mypy/checkexpr.py b/mypy/checkexpr.py
    strfrm_checker: StringFormatterChecker
    plugin: Plugin

    _arg_infer_context_cache: ArgumentInferContext | None

    def __init__(
        self,
        chk: mypy.checker.TypeChecker,
        self.is_callee = False
        type_state.infer_polymorphic = not self.chk.options.old_type_inference

        self._arg_infer_context_cache = None

    def reset(self) -> None:
        self.resolved_type = {}

        return callee_type, inferred_args

    def argument_infer_context(self) -> ArgumentInferContext:
        return ArgumentInferContext(
            self.chk.named_type("typing.Mapping"), self.chk.named_type("typing.Iterable")
        )
        if self._arg_infer_context_cache is None:
            self._arg_infer_context_cache = ArgumentInferContext(
                self.chk.named_type("typing.Mapping"), self.chk.named_type("typing.Iterable")
            )
        return self._arg_infer_context_cache

    def get_arg_infer_passes(
        self,
Original file line number	Diff line number	Diff line change
Expand Up		@@ -318,6 +318,8 @@ class ExpressionChecker(ExpressionVisitor[Type], ExpressionCheckerSharedApi):
		strfrm_checker: StringFormatterChecker
		plugin: Plugin

		_arg_infer_context_cache: ArgumentInferContext \| None

		def __init__(
		self,
		chk: mypy.checker.TypeChecker,
Expand DownExpand Up		@@ -352,6 +354,8 @@ def __init__(
		self.is_callee = False
		type_state.infer_polymorphic = not self.chk.options.old_type_inference

		self._arg_infer_context_cache = None

		def reset(self) -> None:
		self.resolved_type = {}

Expand DownExpand Up		@@ -2277,9 +2281,11 @@ def infer_function_type_arguments_pass2(
		return callee_type, inferred_args

		def argument_infer_context(self) -> ArgumentInferContext:
		return ArgumentInferContext(
		self.chk.named_type("typing.Mapping"), self.chk.named_type("typing.Iterable")
		)
		if self._arg_infer_context_cache is None:
		self._arg_infer_context_cache = ArgumentInferContext(
		self.chk.named_type("typing.Mapping"), self.chk.named_type("typing.Iterable")
		)
		return self._arg_infer_context_cache

		def get_arg_infer_passes(
		self,
Expand Down