Address Copilot review suggestions on PR #366

- Use `bidict.forceput()` in `register_actor()` to handle
  duplicate addr values from stale entries or actor restarts.
- Fix `uid` annotation to `tuple[str, str]|None` in
  `maybe_open_portal()` and handle the `None` return from
  `delete_addr()` in log output.
- Pass explicit `registry_addrs=[reg_addr]` to `open_nursery()`
  and `find_actor()` in `test_stale_entry_is_deleted` to ensure
  the test uses the remote registrar.
- Update `query_actor()` docstring to document the new
  `(addr, reg_portal)` yield shape.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_discovery.py

@@ -491,6 +491,7 @@ def test_stale_entry_is_deleted(
         async with (
             tractor.open_nursery(
                 debug_mode=debug_mode,
+                registry_addrs=[reg_addr],
             ) as an,
             tractor.get_registry(reg_addr) as _reg_ptl,
         ):
@@ -501,7 +502,10 @@ def test_stale_entry_is_deleted(
             async with ptl.open_context(
                 kill_transport,
             ) as (first, ctx):
-                async with tractor.find_actor(name) as maybe_portal:
+                async with tractor.find_actor(
+                    name,
+                    registry_addrs=[reg_addr],
+                ) as maybe_portal:
                     # because the transitive
                     # `._discovery.maybe_open_portal()` call should
                     # fail and implicitly call `.delete_addr()`

tractor/_discovery.py

@@ -160,8 +160,12 @@ async def query_actor(
     Lookup a transport address (by actor name) via querying a registrar
     listening @ `regaddr`.
 
-    Returns the transport protocol (socket) address or `None` if no
+    Yields a `tuple` of `(addr, reg_portal)` where,
-    entry under that name exists.
+    - `addr` is the transport protocol (socket) address or `None` if
+      no entry under that name exists,
+    - `reg_portal` is the `Portal` to the registrar used for the
+      lookup (or `None` when the peer was found locally via
+      `get_peer_by_name()`).
 
     '''
     actor: Actor = current_actor()
@@ -225,16 +229,21 @@ async def maybe_open_portal(
             # NOTE: ensure we delete the stale entry
             # from the registrar actor when available.
             if reg_portal is not None:
-                uid: tuple[str, str] = await reg_portal.run_from_ns(
+                uid: tuple[str, str]|None = await reg_portal.run_from_ns(
                     'self',
                     'delete_addr',
                     addr=addr,
                 )
+                if uid:
                     log.warning(
                         f'Deleted stale registry entry !\n'
                         f'addr: {addr!r}\n'
                         f'uid: {uid!r}\n'
                     )
+                else:
+                    log.warning(
+                        f'No registry entry found for addr: {addr!r}'
+                    )
             else:
                 log.warning(
                     f'Connection to {addr!r} failed'

tractor/_runtime.py

@@ -2013,8 +2013,13 @@ class Arbiter(Actor):
             # should never be 0-dynamic-os-alloc
             await debug.pause()
 
-        # XXX NOTE, value must also be hashable.
+        # XXX NOTE, value must also be hashable AND since
-        self._registry[uid] = tuple(addr)
+        # `._registry` is a `bidict` values must be unique; use
+        # `.forceput()` to replace any prior (stale) entries
+        # that might map a different uid to the same addr (e.g.
+        # after an unclean shutdown or actor-restart reusing
+        # the same address).
+        self._registry.forceput(uid, tuple(addr))
 
         # pop and signal all waiter events
         events = self._waiters.pop(name, [])