KeyError: '_typeshed' crash in dmypy run

[CoolCat467]

Crash Report

Basically I was working on making sure all the type annotations were good for a project I was working on and after fixing multiple files with errors, preforming a dmypy run on a file ended up crashing the dmypy daemon. Subsequent runs after the crash haven't seemed to result in crashes. I can't seem to reproduce the error, but I thought I'd make a new issue just in case.
This might be related somehow to #15246, the final exception is the same.

Traceback

Daemon crashed!
Traceback (most recent call last):
  File "mypy/dmypy_server.py", line 230, in serve
  File "mypy/dmypy_server.py", line 277, in run_command
  File "mypy/dmypy_server.py", line 345, in cmd_run
  File "mypy/dmypy_server.py", line 414, in check
  File "mypy/dmypy_server.py", line 663, in fine_grained_increment_follow_imports
  File "mypy/server/update.py", line 267, in update
  File "mypy/server/update.py", line 369, in update_one
  File "mypy/server/update.py", line 452, in update_module
  File "mypy/server/update.py", line 881, in propagate_changes_using_dependencies
  File "mypy/server/update.py", line 1024, in reprocess_nodes
  File "mypy/checker.py", line 526, in check_second_pass
  File "mypy/checker.py", line 537, in check_partial
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 774, in accept
  File "mypy/checker.py", line 960, in visit_func_def
  File "mypy/checker.py", line 964, in _visit_func_def
  File "mypy/checker.py", line 1036, in check_func_item
  File "mypy/checker.py", line 1216, in check_func_def
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1208, in accept
  File "mypy/checker.py", line 2617, in visit_block
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 774, in accept
  File "mypy/checker.py", line 960, in visit_func_def
  File "mypy/checker.py", line 964, in _visit_func_def
  File "mypy/checker.py", line 1036, in check_func_item
  File "mypy/checker.py", line 1216, in check_func_def
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1208, in accept
  File "mypy/checker.py", line 2617, in visit_block
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 884, in accept
  File "mypy/checker.py", line 4625, in visit_decorator
  File "mypy/checker.py", line 1036, in check_func_item
  File "mypy/checker.py", line 1216, in check_func_def
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1208, in accept
  File "mypy/checker.py", line 2617, in visit_block
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1389, in accept
  File "mypy/checker.py", line 4490, in visit_for_stmt
  File "mypy/checker.py", line 602, in accept_loop
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1208, in accept
  File "mypy/checker.py", line 2617, in visit_block
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1531, in accept
  File "mypy/checker.py", line 4346, in visit_try_stmt
  File "mypy/checker.py", line 4382, in visit_try_without_finally
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1208, in accept
  File "mypy/checker.py", line 2617, in visit_block
  File "mypy/checker.py", line 584, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checker.py", line 582, in accept
  File "mypy/nodes.py", line 1404, in accept
  File "mypy/checker.py", line 4141, in visit_return_stmt
  File "mypy/checker.py", line 4175, in check_return_stmt
  File "mypy/checkexpr.py", line 4892, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checkexpr.py", line 4890, in accept
  File "mypy/nodes.py", line 2736, in accept
  File "mypy/checkexpr.py", line 5030, in visit_await_expr
  File "mypy/checkexpr.py", line 4892, in accept
  File "mypy/errors.py", line 1177, in report_internal_error
  File "mypy/checkexpr.py", line 4890, in accept
  File "mypy/nodes.py", line 1889, in accept
  File "mypy/checkexpr.py", line 429, in visit_call_expr
  File "mypy/checkexpr.py", line 549, in visit_call_expr_inner
  File "mypy/checkexpr.py", line 1209, in check_call_expr_with_callee_type
  File "mypy/checkexpr.py", line 1292, in check_call
  File "mypy/checkexpr.py", line 1483, in check_callable_call
  File "mypy/checkexpr.py", line 2126, in check_argument_types
  File "mypy/checkexpr.py", line 4944, in is_valid_keyword_var_arg
  File "mypy/checker.py", line 6134, in named_generic_type
  File "mypy/checker.py", line 6141, in lookup_typeinfo
  File "mypy/checker.py", line 6219, in lookup_qualified
KeyError: '_typeshed'

To Reproduce

dmypy --status-file=/home/<my username>/.idlerc/mypy/dmypy.json run --log-file=/home/<my username>/.idlerc/mypy/log.txt /home/<my username>/<path to file> -- --no-error-summary --show-absolute-path --no-implicit-reexport --soft-error-limit=-1 --show-error-end --no-color-output --warn-unused-ignores --cache-fine-grained --warn-unreachable --disallow-untyped-calls --hide-error-context --disallow-untyped-defs --show-column-numbers --cache-dir=/home/<my username>/.idlerc/mypy --no-warn-no-return --show-error-codes --warn-redundant-casts --show-traceback --strict

Curiously, the specified log file from the arguments is empty, the traceback listed was from the daemon response. In previous versions of mypy, any tracebacks from crashes would appear in that log file. This is probably better suited discussing in another issue though.

Potentially relevant details from said file:

from __future__ import annotations

import typing as t
from dataclasses import dataclass
from enum import Enum

if t.TYPE_CHECKING:
    from typing_extensions import Self, TypeAlias

class Formatting(Enum):
    BOLD = "l"
    # others omitted

class Color(Enum):
    BLACK = "0"
    # others omitted

@dataclass
class WebColor:
    hex: str
    rgb: tuple[int, int, int]

    @classmethod
    def from_hex(cls, hex: str) -> Self:
        rgb = tuple(int(hex[i : i + 2], 16) for i in (0, 2, 4))
        return cls.from_rgb(rgb)

    @classmethod
    def from_rgb(cls, rgb: tuple[int, int, int]) -> Self:
        cls._check_rgb(rgb)

        hex = "{:02x}{:02x}{:02x}".format(*rgb)
        return cls(hex, rgb)

    @staticmethod
    def _check_rgb(rgb: tuple[int, int, int]) -> None:
        for index, value in enumerate(rgb):
            if not 255 >= value >= 0:
                raise ValueError("outside range")

@dataclass
class TranslationTag:
    id: str

ParsedComponent: TypeAlias = "Formatting | Color | WebColor | TranslationTag | str"

Again, I haven't been able to reproduce the crash.

Edit: Just realized, another file in the same project has this line:

raw = RawJavaResponseMotdWhenDict(**{"extra": raw})

which likely is the real culprit if this is indeed connected to #15246, it's just that the exception propagated and ended up crashing the daemon when checking a different file.

Your Environment

• Mypy version used: 1.3.0
• Mypy command-line flags: See listed above for all daemon flags
• Mypy configuration options from mypy.ini (and other config files): No other configuration files
• Python version used: Python 3.11.0rc1 (main, Aug 12 2022, 10:02:14) [GCC 11.2.0]
• Operating system and version: 64 bit Linux Ubuntu Budgie 10.6.1 (Ubuntu 22.04.2 LTS)