Mypy daemon crash related to decorator

This mypy daemon test case triggers a crash:

[case testUndefinedDecoratorRefersToInit]
import m

[file m.py]
class C:
    def __init__(self, x: int) -> None: ...

[file m.py.2]
from typing_extensions import Self

class C:
    def __init__(self, x: int) -> None: ...

    @classmethod
    @copy_only_params_from_method(__init__)
    async def create(cls, *args, **kwargs) -> Self:
        res = cls(*args, **kwargs)
        await res.async_init()
        return res

    async def async_init(self) -> None: ...
[builtins fixtures/tuple.pyi]
[out]
<omitted>

I'm not yet sure what is going on, and it may be possible to simplify this further.

Traceback:

/Users/jukka/src/mypy/mypy/test/testfinegrained.py:116: in run_case
    output, triggered = self.perform_step(
/Users/jukka/src/mypy/mypy/test/testfinegrained.py:220: in perform_step
    new_messages = self.run_check(server, sources)
/Users/jukka/src/mypy/mypy/test/testfinegrained.py:170: in run_check
    response = server.check(sources, export_types=False, is_tty=False, terminal_width=-1)
/Users/jukka/src/mypy/mypy/dmypy_server.py:431: in check
    messages = self.fine_grained_increment(sources, explicit_export_types=export_types)
/Users/jukka/src/mypy/mypy/dmypy_server.py:589: in fine_grained_increment
    messages = self.fine_grained_manager.update(changed, removed)
/Users/jukka/src/mypy/mypy/server/update.py:265: in update
    result = self.update_one(
/Users/jukka/src/mypy/mypy/server/update.py:367: in update_one
    result = self.update_module(next_id, next_path, next_id in removed_set, followed)
/Users/jukka/src/mypy/mypy/server/update.py:432: in update_module
    result = update_module_isolated(
/Users/jukka/src/mypy/mypy/server/update.py:668: in update_module_isolated
    state.type_check_first_pass()
/Users/jukka/src/mypy/mypy/build.py:2344: in type_check_first_pass
    self.type_checker().check_first_pass()
/Users/jukka/src/mypy/mypy/checker.py:524: in check_first_pass
    self.accept(d)
/Users/jukka/src/mypy/mypy/checker.py:637: in accept
    report_internal_error(err, self.errors.file, stmt.line, self.errors, self.options)
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checker.py:635: in accept
    stmt.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:1445: in accept
    return visitor.visit_class_def(self)
/Users/jukka/src/mypy/mypy/checker.py:2665: in visit_class_def
    self.accept(defn.defs)
/Users/jukka/src/mypy/mypy/checker.py:637: in accept
    report_internal_error(err, self.errors.file, stmt.line, self.errors, self.options)
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checker.py:635: in accept
    stmt.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:1542: in accept
    return visitor.visit_block(self)
/Users/jukka/src/mypy/mypy/checker.py:3126: in visit_block
    self.accept(s)
/Users/jukka/src/mypy/mypy/checker.py:637: in accept
    report_internal_error(err, self.errors.file, stmt.line, self.errors, self.options)
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checker.py:635: in accept
    stmt.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:1127: in accept
    return visitor.visit_decorator(self)
/Users/jukka/src/mypy/mypy/checker.py:5412: in visit_decorator
    self.visit_decorator_inner(e)
/Users/jukka/src/mypy/mypy/checker.py:5419: in visit_decorator_inner
    self.check_func_item(e.func, name=e.func.name, allow_empty=allow_empty)
/Users/jukka/src/mypy/mypy/checker.py:1231: in check_func_item
    self.check_func_def(defn, typ, name, allow_empty)
/Users/jukka/src/mypy/mypy/checker.py:1504: in check_func_def
    self.accept(item.body)
/Users/jukka/src/mypy/mypy/checker.py:637: in accept
    report_internal_error(err, self.errors.file, stmt.line, self.errors, self.options)
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checker.py:635: in accept
    stmt.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:1542: in accept
    return visitor.visit_block(self)
/Users/jukka/src/mypy/mypy/checker.py:3126: in visit_block
    self.accept(s)
/Users/jukka/src/mypy/mypy/checker.py:637: in accept
    report_internal_error(err, self.errors.file, stmt.line, self.errors, self.options)
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checker.py:635: in accept
    stmt.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:1629: in accept
    return visitor.visit_assignment_stmt(self)
/Users/jukka/src/mypy/mypy/checker.py:3177: in visit_assignment_stmt
    self.check_assignment(s.lvalues[-1], s.rvalue, s.type is None, s.new_syntax)
/Users/jukka/src/mypy/mypy/checker.py:3389: in check_assignment
    rvalue_type = self.expr_checker.accept(rvalue, type_context=type_context)
/Users/jukka/src/mypy/mypy/checkexpr.py:6050: in accept
    report_internal_error(
/Users/jukka/src/mypy/mypy/errors.py:1331: in report_internal_error
    raise err
/Users/jukka/src/mypy/mypy/checkexpr.py:6046: in accept
    typ = self.accept_maybe_cache(node, type_context=type_context)
/Users/jukka/src/mypy/mypy/checkexpr.py:6081: in accept_maybe_cache
    typ = node.accept(self)
/Users/jukka/src/mypy/mypy/nodes.py:2253: in accept
    return visitor.visit_call_expr(self)
/Users/jukka/src/mypy/mypy/checkexpr.py:494: in visit_call_expr
    return self.visit_call_expr_inner(e, allow_none_return=allow_none_return)
/Users/jukka/src/mypy/mypy/checkexpr.py:631: in visit_call_expr_inner
    ret_type = self.check_call_expr_with_callee_type(
/Users/jukka/src/mypy/mypy/checkexpr.py:1481: in check_call_expr_with_callee_type
    ret_type, callee_type = self.check_call(
/Users/jukka/src/mypy/mypy/checkexpr.py:1629: in check_call
    item = self.analyze_type_type_callee(callee.item, context)
/Users/jukka/src/mypy/mypy/checkexpr.py:1885: in analyze_type_type_callee
    callee = self.analyze_type_type_callee(get_proper_type(item.upper_bound), context)
/Users/jukka/src/mypy/mypy/checkexpr.py:1863: in analyze_type_type_callee
    res = type_object_type(item.type, self.named_type)
/Users/jukka/src/mypy/mypy/typeops.py:177: in type_object_type
    init_index = info.mro.index(init_method.node.info)
E   ValueError: <TypeInfo m.C> is not in list
---------------------------------------------------- Captured stdout call ----------------------------------------------------
tmp/m.py:7: error: Name "copy_only_params_from_method" is not defined
---------------------------------------------------- Captured stderr call ----------------------------------------------------
tmp/m.py:9: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py:9: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py:9: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py:6: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py:4: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py: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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty
tmp/m.py: 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://github.com/python/mypy/issues
version: 1.19.0+dev.fd0526545419028090f064ba4c1fa6e576ccdd6b.dirty