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lesliehuh opened this issue Apr 28, 2025 · 2 comments
Closed

Internal error when running check-classes.test with pytest #18994

lesliehuh opened this issue Apr 28, 2025 · 2 comments
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bug mypy got something wrong pending Issues that may be closed topic-developer Issues relevant to mypy developers topic-tests

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@lesliehuh
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Crash Report

FAILURES ===============================================================================
___________________________________________________________________ testInitSubclassUnannotatedMulti ___________________________________________________________________
[gw5] linux -- Python 3.12.9 /workspaces/mypy/venv/bin/python
data: /workspaces/mypy/test-data/unit/check-classes.test:7426:
SystemExit: 2
------------------------------------------------------------------------- Captured stdout call -------------------------------------------------------------------------
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 8, in <module>
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1806, in serve
    WorkerGateway(io=io, id=id, _startcount=2).serve()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1273, in serve
    self._execpool.integrate_as_primary_thread()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 389, in integrate_as_primary_thread
    self._perform_spawn(reply)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 411, in _perform_spawn
    reply.run()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 341, in run
    self._result = func(*args, **kwargs)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1291, in executetask
    exec(co, loc)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 393, in <module>
    config.hook.pytest_cmdline_main(config=config)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 330, in pytest_cmdline_main
    return wrap_session(config, _main)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 283, in wrap_session
    session.exitstatus = doit(config, session) or 0
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 337, in _main
    config.hook.pytest_runtestloop(session=session)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 174, in pytest_runtestloop
    self.run_one_test()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 195, in run_one_test
    self.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 113, in pytest_runtest_protocol
    runtestprotocol(item, nextitem=nextitem)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 132, in runtestprotocol
    reports.append(call_and_report(item, "call", log))
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 241, in call_and_report
    call = CallInfo.from_call(
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 341, in from_call
    result: TResult | None = func()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 242, in <lambda>
    lambda: runtest_hook(item=item, **kwds), when=when, reraise=reraise
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 174, in pytest_runtest_call
    item.runtest()
  File "/workspaces/mypy/mypy/test/data.py", line 323, in runtest
    suite.run_case(self)
  File "/workspaces/mypy/mypy/test/testcheck.py", line 85, in run_case
    self.run_case_once(testcase)
  File "/workspaces/mypy/mypy/test/testcheck.py", line 165, in run_case_once
    res = build.build(sources=sources, options=options, alt_lib_path=test_temp_dir)
  File "/workspaces/mypy/mypy/build.py", line 191, in build
    result = _build(
  File "/workspaces/mypy/mypy/build.py", line 267, in _build
    graph = dispatch(sources, manager, stdout)
  File "/workspaces/mypy/mypy/build.py", line 2939, in dispatch
    process_graph(graph, manager)
  File "/workspaces/mypy/mypy/build.py", line 3337, in process_graph
    process_stale_scc(graph, scc, manager)
  File "/workspaces/mypy/mypy/build.py", line 3438, in process_stale_scc
    graph[id].type_check_first_pass()
  File "/workspaces/mypy/mypy/build.py", line 2311, in type_check_first_pass
    self.type_checker().check_first_pass()
  File "/workspaces/mypy/mypy/checker.py", line 472, in check_first_pass
    self.accept(d)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1200, in accept
    return visitor.visit_class_def(self)
  File "/workspaces/mypy/mypy/checker.py", line 2536, in visit_class_def
    self.accept(defn.defs)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1281, in accept
    return visitor.visit_block(self)
  File "/workspaces/mypy/mypy/checker.py", line 3025, in visit_block
    self.accept(s)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 813, in accept
    return visitor.visit_func_def(self)
  File "/workspaces/mypy/mypy/checker.py", line 1129, in visit_func_def
    self._visit_func_def(defn)
  File "/workspaces/mypy/mypy/checker.py", line 1133, in _visit_func_def
    self.check_func_item(defn, name=defn.name)
  File "/workspaces/mypy/mypy/checker.py", line 1168, in check_func_item
    self.check_func_def(defn, typ, name, allow_empty)
  File "/workspaces/mypy/mypy/checker.py", line 1455, in check_func_def
    self.accept(item.body)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1281, in accept
    return visitor.visit_block(self)
  File "/workspaces/mypy/mypy/checker.py", line 3025, in visit_block
    self.accept(s)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1301, in accept
    return visitor.visit_expression_stmt(self)
  File "/workspaces/mypy/mypy/checker.py", line 4711, in visit_expression_stmt
    expr_type = self.expr_checker.accept(s.expr, allow_none_return=True, always_allow_any=True)
  File "/workspaces/mypy/mypy/checkexpr.py", line 5998, in accept
    typ = self.visit_call_expr(node, allow_none_return=True)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 488, in visit_call_expr
    return self.visit_call_expr_inner(e, allow_none_return=allow_none_return)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 622, in visit_call_expr_inner
    ret_type = self.check_call_expr_with_callee_type(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 1504, in check_call_expr_with_callee_type
    ret_type, callee_type = self.check_call(
                            ^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 1621, in check_call
    return self.check_any_type_call(args, callee, arg_kinds, context)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 3335, in check_any_type_call
    self.check_args_unpacking(arg_types, arg_kinds, context)
  File "/workspaces/mypy/mypy/checkexpr.py", line 3353, in check_args_unpacking
    if arg_kind == nodes.ARG_STAR2 and not self.is_valid_keyword_var_arg(arg_type):
                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 6059, in is_valid_keyword_var_arg
    self.chk.named_generic_type(
  File "/workspaces/mypy/mypy/checker.py", line 7262, in named_generic_type
    info = self.lookup_typeinfo(name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checker.py", line 7269, in lookup_typeinfo
    sym = self.lookup_qualified(fullname)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checker.py", line 7347, in lookup_qualified
    n = self.modules[parts[0]]
        ~~~~~~~~~~~~^^^^^^^^^^
KeyError: '_typeshed'
------------------------------------------------------------------------- Captured stderr call -------------------------------------------------------------------------
main:8: error: INTERNAL ERROR -- Please try using mypy master on GitHub:
https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build
Please report a bug at https://git.1-hub.cnpython/mypy/issues
version: 1.16.0+dev.96d250cf94c217f05f6de17df7f2f236e222d23b
main:8: : note: use --pdb to drop into pdb
_____________________________________________________________________ testInitSubclassUnannotated ______________________________________________________________________
[gw9] linux -- Python 3.12.9 /workspaces/mypy/venv/bin/python
data: /workspaces/mypy/test-data/unit/check-classes.test:7415:
SystemExit: 2
------------------------------------------------------------------------- Captured stdout call -------------------------------------------------------------------------
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 8, in <module>
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1806, in serve
    WorkerGateway(io=io, id=id, _startcount=2).serve()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1273, in serve
    self._execpool.integrate_as_primary_thread()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 389, in integrate_as_primary_thread
    self._perform_spawn(reply)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 411, in _perform_spawn
    reply.run()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 341, in run
    self._result = func(*args, **kwargs)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1291, in executetask
    exec(co, loc)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 393, in <module>
    config.hook.pytest_cmdline_main(config=config)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 330, in pytest_cmdline_main
    return wrap_session(config, _main)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 283, in wrap_session
    session.exitstatus = doit(config, session) or 0
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/main.py", line 337, in _main
    config.hook.pytest_runtestloop(session=session)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 174, in pytest_runtestloop
    self.run_one_test()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/xdist/remote.py", line 195, in run_one_test
    self.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 113, in pytest_runtest_protocol
    runtestprotocol(item, nextitem=nextitem)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 132, in runtestprotocol
    reports.append(call_and_report(item, "call", log))
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 241, in call_and_report
    call = CallInfo.from_call(
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 341, in from_call
    result: TResult | None = func()
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 242, in <lambda>
    lambda: runtest_hook(item=item, **kwds), when=when, reraise=reraise
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File "/workspaces/mypy/venv/lib/python3.12/site-packages/_pytest/runner.py", line 174, in pytest_runtest_call
    item.runtest()
  File "/workspaces/mypy/mypy/test/data.py", line 323, in runtest
    suite.run_case(self)
  File "/workspaces/mypy/mypy/test/testcheck.py", line 85, in run_case
    self.run_case_once(testcase)
  File "/workspaces/mypy/mypy/test/testcheck.py", line 165, in run_case_once
    res = build.build(sources=sources, options=options, alt_lib_path=test_temp_dir)
  File "/workspaces/mypy/mypy/build.py", line 191, in build
    result = _build(
  File "/workspaces/mypy/mypy/build.py", line 267, in _build
    graph = dispatch(sources, manager, stdout)
  File "/workspaces/mypy/mypy/build.py", line 2939, in dispatch
    process_graph(graph, manager)
  File "/workspaces/mypy/mypy/build.py", line 3337, in process_graph
    process_stale_scc(graph, scc, manager)
  File "/workspaces/mypy/mypy/build.py", line 3438, in process_stale_scc
    graph[id].type_check_first_pass()
  File "/workspaces/mypy/mypy/build.py", line 2311, in type_check_first_pass
    self.type_checker().check_first_pass()
  File "/workspaces/mypy/mypy/checker.py", line 472, in check_first_pass
    self.accept(d)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1200, in accept
    return visitor.visit_class_def(self)
  File "/workspaces/mypy/mypy/checker.py", line 2536, in visit_class_def
    self.accept(defn.defs)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1281, in accept
    return visitor.visit_block(self)
  File "/workspaces/mypy/mypy/checker.py", line 3025, in visit_block
    self.accept(s)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 813, in accept
    return visitor.visit_func_def(self)
  File "/workspaces/mypy/mypy/checker.py", line 1129, in visit_func_def
    self._visit_func_def(defn)
  File "/workspaces/mypy/mypy/checker.py", line 1133, in _visit_func_def
    self.check_func_item(defn, name=defn.name)
  File "/workspaces/mypy/mypy/checker.py", line 1168, in check_func_item
    self.check_func_def(defn, typ, name, allow_empty)
  File "/workspaces/mypy/mypy/checker.py", line 1455, in check_func_def
    self.accept(item.body)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1281, in accept
    return visitor.visit_block(self)
  File "/workspaces/mypy/mypy/checker.py", line 3025, in visit_block
    self.accept(s)
  File "/workspaces/mypy/mypy/checker.py", line 579, in accept
    stmt.accept(self)
  File "/workspaces/mypy/mypy/nodes.py", line 1301, in accept
    return visitor.visit_expression_stmt(self)
  File "/workspaces/mypy/mypy/checker.py", line 4711, in visit_expression_stmt
    expr_type = self.expr_checker.accept(s.expr, allow_none_return=True, always_allow_any=True)
  File "/workspaces/mypy/mypy/checkexpr.py", line 5998, in accept
    typ = self.visit_call_expr(node, allow_none_return=True)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 488, in visit_call_expr
    return self.visit_call_expr_inner(e, allow_none_return=allow_none_return)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 622, in visit_call_expr_inner
    ret_type = self.check_call_expr_with_callee_type(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 1504, in check_call_expr_with_callee_type
    ret_type, callee_type = self.check_call(
                            ^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 1621, in check_call
    return self.check_any_type_call(args, callee, arg_kinds, context)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 3335, in check_any_type_call
    self.check_args_unpacking(arg_types, arg_kinds, context)
  File "/workspaces/mypy/mypy/checkexpr.py", line 3353, in check_args_unpacking
    if arg_kind == nodes.ARG_STAR2 and not self.is_valid_keyword_var_arg(arg_type):
                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checkexpr.py", line 6059, in is_valid_keyword_var_arg
    self.chk.named_generic_type(
  File "/workspaces/mypy/mypy/checker.py", line 7262, in named_generic_type
    info = self.lookup_typeinfo(name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checker.py", line 7269, in lookup_typeinfo
    sym = self.lookup_qualified(fullname)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspaces/mypy/mypy/checker.py", line 7347, in lookup_qualified
    n = self.modules[parts[0]]
        ~~~~~~~~~~~~^^^^^^^^^^
KeyError: '_typeshed'
------------------------------------------------------------------------- Captured stderr call -------------------------------------------------------------------------
main:3: error: INTERNAL ERROR -- Please try using mypy master on GitHub:
https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build
Please report a bug at https://git.1-hub.cnpython/mypy/issues
version: 1.16.0+dev.96d250cf94c217f05f6de17df7f2f236e222d23b
main:3: : note: use --pdb to drop into pdb
======================================================================= short test summary info ========================================================================
FAILED mypy/test/testcheck.py::TypeCheckSuite::check-classes.test::testInitSubclassUnannotatedMulti
FAILED mypy/test/testcheck.py::TypeCheckSuite::check-classes.test::testInitSubclassUnannotated
=============================================================== 2 failed, 566 passed, 1 xfailed in 2.19s ===============================================================
(venv) vscode ➜ /workspaces/mypy (missing-args-callable) $ pytest mypy/test/testcheck.py::TypeCheckSuite::check-classes.test --show-traceback
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --show-traceback
  inifile: /workspaces/mypy/pyproject.toml
  rootdir: /workspaces/mypy

(venv) vscode ➜ /workspaces/mypy (missing-args-callable) $ pytest --show-traceback mypy/test/testcheck.py::TypeCheckSuite::check-classes.test
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --show-traceback
  inifile: /workspaces/mypy/pyproject.toml
  rootdir: /workspaces/mypy

(venv) vscode ➜ /workspaces/mypy (missing-args-callable) $ mypy mypy/test/testcheck.py::TypeCheckSuite
mypy: can't read file 'mypy/test/testcheck.py::TypeCheckSuite': No such file or directory
(venv) vscode ➜ /workspaces/mypy (missing-args-callable) $ mypy mypy/test/testcheck.py --show-traceback
mypy/bogus_type.py:27: error: Cannot assign multiple types to name "Bogus" without an explicit "Type[...]" annotation  [misc]
Found 1 error in 1 file (checked 1 source file)

Traceback

(venv) vscode ➜ /workspaces/mypy (missing-args-callable) $ mypy mypy/test/testcheck.py --show-traceback
mypy/bogus_type.py:27: error: Cannot assign multiple types to name "Bogus" without an explicit "Type[...]" annotation  [misc]
Found 1 error in 1 file (checked 1 source file)

To Reproduce

I ran
pytest mypy/test/testcheck.py::TypeCheckSuite::check-classes.test because that seems to be the only test file it's tripping on.

Your Environment

  • Mypy version used: 1.16.0
  • Mypy command-line flags: --show-traceback
  • Python version used: 3.12.9
  • Operating system and version: Mac OS Sequoia 15.3.1

Some extra context
This is something that occurred while trying to fix issue #18990 (refer to this PR). We only made changes to two files, and I'm kinda stumped trying to figure out how to troubleshoot this. I can't figure out if I've run into a bug or if I broke something, so I was hoping someone could take a look and tell me if something got screwed up in the process. Thanks!
@sterliakov sterliakov added bug mypy got something wrong topic-developer Issues relevant to mypy developers topic-tests and removed crash labels Apr 29, 2025
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The easiest fix would be to import _typeshed in test-data/unit/fixtures/object_with_init_subclass.pyi.

We only have a handful of tests using it, so that shouldn't be too bad for test performance. This is not a bug with the test suite, but rather a limitation of our fixture-based approach to builtin selection. Not all builtin symbols are available in all tests, that's what [builtins fixtures/something.pyi] does in some tests.

@sterliakov sterliakov added the pending Issues that may be closed label Apr 29, 2025
@lesliehuh lesliehuh mentioned this issue Apr 30, 2025
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that worked, thank you!

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