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Commit "Improve unmarshall performance" (3282eed) broke the introspection abilities. Trying to introspect now simply gives Remote peer disconnected.
Can be reproduced with the example high level service from the docs or this GLib based one:
#!/usr/bin/env python3
from dbus_next import BusType, Variant, PropertyAccess, DBusError
from dbus_next.glib import MessageBus
from dbus_next.service import ServiceInterface, method, dbus_property, signal
from gi.repository import GLib
import dbus_next
class Foo(ServiceInterface):
def __init_(self, bus):
bus.export("/com/example/sample0")
@dbus_property(access=PropertyAccess.READ)
def Integer(self) -> "i": # type: ignore
return 1
bus = MessageBus(bus_type=BusType.SESSION).connect_sync()
bus.request_name_sync("com.example.name", dbus_next.NameFlag.REPLACE_EXISTING)
try:
mainloop = GLib.MainLoop()
mainloop.run()
except KeyboardInterrupt:
passTo trigger the error, run this command:
$ gdbus introspect --session --dest com.example.name --object-path /com/example/sample0
Error: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Remote peer disconnected
In the GLib case it fails quietly with no error, the asyncio case returns this traceback:
/home/whot/tmp/2022-11-17-Thu/test_async.py:65: DeprecationWarning: There is no current event loop
asyncio.get_event_loop().run_until_complete(main())
Traceback (most recent call last):
File "/home/whot/tmp/2022-11-17-Thu/test_async.py", line 65, in <module>
asyncio.get_event_loop().run_until_complete(main())
File "/usr/lib64/python3.11/asyncio/base_events.py", line 650, in run_until_complete
return future.result()
^^^^^^^^^^^^^^^
File "/home/whot/tmp/2022-11-17-Thu/test_async.py", line 63, in main
await bus.wait_for_disconnect()
File "/home/whot/.local/lib/python3.11/site-packages/dbus_next/aio/message_bus.py", line 342, in wait_for_disconnect
return await self._disconnect_future
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/whot/.local/lib/python3.11/site-packages/dbus_next/aio/message_bus.py", line 365, in _message_reader
if self._unmarshaller.unmarshall():
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/whot/.local/lib/python3.11/site-packages/dbus_next/_private/unmarshaller.py", line 297, in unmarshall
self._read_header()
File "/home/whot/.local/lib/python3.11/site-packages/dbus_next/_private/unmarshaller.py", line 247, in _read_header
self.flag = MESSAGE_FLAG_MAP[buffer[2]]
~~~~~~~~~~~~~~~~^^^^^^^^^^^
KeyError: 0
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