Crashes for created TypedDicts from unpacked dictionaries when creating reports

[md384]

Crash Report

Mypy will crash when creating a TypedDict using keyword unpacking on a loaded JSON-encoded dictionary when also generating reports. In our case, it happens when --cobertura-xml-report option is used.

Traceback

Traceback (most recent call last):
  File "PATH/.nox/mypy-3-11/bin/mypy", line 8, in <module>
    sys.exit(console_entry())
  File "mypy/build.py", line 2069, in wrap_context
  File "mypy/build.py", line 2405, in finish_passes
  File "mypy/build.py", line 872, in report_file
  File "mypy/report.py", line 91, in file
  File "mypy/report.py", line 632, in on_file
  File "mypy/nodes.py", line 377, in accept
  File "mypy/stats.py", line 119, in visit_mypy_file
  File "mypy/traverser.py", line 114, in visit_mypy_file
  File "mypy/nodes.py", line 1309, in accept
  File "mypy/stats.py", line 218, in visit_assignment_stmt
  File "mypy/traverser.py", line 164, in visit_assignment_stmt
  File "mypy/nodes.py", line 1903, in accept
  File "mypy/stats.py", line 255, in visit_call_expr
  File "mypy/stats.py", line 264, in record_call_target_precision
  File "mypy/stats.py", line 278, in record_callable_target_precision
  File "mypy/argmap.py", line 130, in map_formals_to_actuals
  File "mypy/argmap.py", line 84, in map_actuals_to_formals
  File "mypy/stats.py", line 283, in <lambda>
KeyError: <mypy.nodes.CallExpr object at 0x1147d3400>
FILENAME: : note: use --pdb to drop into pdb
Generated Cobertura report: PATH/reports/cobertura.xml

To Reproduce

from typing import TypedDict
import json


class MyDict(TypedDict):
    a: int
    b: int


data = {"a": 1, "b": 2}
foo: MyDict = MyDict(**json.loads(json.dumps(data)))  # type: ignore[typeddict-item]

mypy . --no-namespace-packages --strict-equality --no-implicit-optional --show-error-codes --warn-redundant-casts --warn-unused-ignores --warn-unused-configs --strict-equality --extra-checks --check-untyped-defs --cobertura-xml-report=PATH_TO_REPORTS

Your Environment

• Mypy version used: 1.5.0
• Mypy command-line flags: --no-namespace-packages --strict-equality --no-implicit-optional --show-error-codes --warn-redundant-casts --warn-unused-ignores --warn-unused-configs --strict-equality --extra-checks --check-untyped-defs --cobertura-xml-report=PATH_TO_REPORTS
• Mypy configuration options from mypy.ini (and other config files): None
• Python version used: 3.11
• Operating system and version: MacOS 11.7.3