Fix race in `WithWaitForLeave` that flaked `TestPartialStateJoin/Outgoing_device_list_updates` by erikjohnston · Pull Request #878 · matrix-org/complement

erikjohnston · 2026-06-08T18:26:21Z

🤖 Generated with Claude Code

Background

TestPartialStateJoin/Outgoing_device_list_updates (in tests/msc3902) flakes in downstream CI (seen in Synapse), failing during test cleanup with:

federation_room_join_partial_state_test.go:77: Received unexpected PDU: {…"membership":"leave"…}

The "unexpected" PDU is the joining user's own leave, sent legitimately as the test tears down — so this is a race in the test helper, not a homeserver bug.

Root cause

WithWaitForLeave registers a PDU handler whose callback pushes matching leaves onto leaveChannel, then decides whether to block by peeking at room.CurrentState:

removePDUHandler := s.AddPDUHandler(func(e) bool { /* push leaveChannel; return true */ })
defer removePDUHandler()

leaveAction()

if room.CurrentState("m.room.member", userID) == "leave" {  // "already seen" shortcut
    // return without consuming the channel
} else {
    <-leaveChannel // …or 1s timeout
}

When a transaction arrives, HandleTransactionRequests calls room.AddEvent (which updates CurrentState) before invoking the PDU callback. So this interleaving is possible:

fed goroutine: room.AddEvent(leave) → CurrentState(user) == "leave", callback not yet run
test goroutine: shortcut sees "leave" → returns → defer removePDUHandler() deletes the handler
fed goroutine: PDU callback runs → no handler matches → t.Errorf("Received unexpected PDU")

The helper used two different signals for the same event — the callback channel and CurrentState — and tore its handler down based on the one that fires first. It's flaky because it only fails when the scheduler switches between
AddEvent and the callback (more likely under CI load).

Fix

Wait on the channel fed by the handler instead of polling room.CurrentState, so the handler stays registered until its own callback has run.

Every caller passes a joined user and an action that performs the leave, so the leave always arrives fresh via that callback — there is no legitimate "already left" case. Make that contract explicit instead of papering over it:

Snapshot membership before the action and fail (t.Errorf) if the user has already left, rather than silently treating it as "already seen". The action still runs in that case, so any cleanup it performs (e.g.
partialStateJoinResult.Destroy) is preserved.
For the normal case, wait on leaveChannel.
Fail on timeout — the lenient CurrentState fallback is gone, since neither an already-left user nor a timeout should happen in correct usage.

This is contained to the msc3902 helper. The HandleTransactionRequests ordering (callback after room.AddEvent) is left intact, as other tests rely on it — e.g. federation_redaction_test.go reads serverRoom.Timeline
immediately after a callback-driven waiter.

…ave-handler race `WithWaitForLeave` registered a PDU handler (whose callback feeds `leaveChannel`) but then decided whether to wait by peeking at `room.CurrentState`. Because an incoming PDU is added to the room (`HandleTransactionRequests` calls `room.AddEvent`, updating `CurrentState`) *before* the PDU callback runs, the test goroutine could observe the updated state, take the "already seen" shortcut and return, firing the deferred `removePDUHandler()` in the window before the callback ran. The now-handler-less callback then flagged the (expected) leave as an unexpected PDU, failing the test. Wait on the channel fed by the handler instead of polling `room.CurrentState`, so the handler stays registered until its own callback has run. Every caller passes a joined user and an action that performs the leave, so the leave always arrives fresh via that callback. Make this contract explicit: snapshot membership before the action and fail if the user has already left (rather than silently treating it as "already seen"), and fail on timeout, since neither should happen in correct usage. The action still runs in the already-left case so any cleanup it performs is preserved. The `HandleTransactionRequests` ordering (callback after `room.AddEvent`) is left unchanged, as other tests rely on it (e.g. `federation_redaction_test.go` reads `serverRoom.Timeline` immediately after a callback-driven waiter).

MadLittleMods · 2026-06-09T19:45:03Z

+		t.Errorf("%s timed out waiting for %s to leave test room %s.", s.ServerName(), userID, room.RoomID)
 	}
 }



Tests are failing:

❌ TestPartialStateJoin (2m34.33s) ❌ TestPartialStateJoin/Leave_during_resync (10.99s) ❌ TestPartialStateJoin/Leave_during_resync/does_not_wait_for_resync (2.28s) ❌ TestPartialStateJoin/Leave_during_resync/is_seen_after_the_resync (2.29s) ❌ TestPartialStateJoin/Outgoing_device_list_updates (24.94s) ❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_all_servers_in_partial_state_rooms (1.68s) ❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_incorrectly_absent_servers_once_partial_state_join_completes (3.81s) ❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_incorrectly_kicked_servers_once_partial_state_join_completes (5.67s) ❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_newly_joined_servers_in_partial_state_rooms (4.67s)

Specifics for couple test cases:

❌ TestPartialStateJoin/Leave_during_resync/does_not_wait_for_resync (2.28s) client.go:860: [CSAPI] POST hs1/_matrix/client/v3/register => 200 OK (111.307859ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/capabilities => 200 OK (4.095333ms) server.go:210: Creating room !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 with version 10 federation_room_join_partial_state_test.go:3684: Alice begins a partial join to a room federation_room_join_partial_state_test.go:4510: Registered state_ids handler for event $bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g federation_room_join_partial_state_test.go:4551: Registered /state handler for event $bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g 2026/06/09 08:48:20 Received send-join of event $sWMXmm7djuzQ7_nFd8y6dW01nIvFTjgvCog7R-viTVo client.go:860: [CSAPI] POST hs1/_matrix/client/v3/join/!0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 => 200 OK (75.501743ms) federation_room_join_partial_state_test.go:4404: /join request completed federation_room_join_partial_state_test.go:3688: Alice waits to see her join federation_room_join_partial_state_test.go:4489: Incoming state_ids request for event [$bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g] in room !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (22.618627ms) federation_room_join_partial_state_test.go:3695: Alice leaves and waits for confirmation client.go:860: [CSAPI] POST hs1/_matrix/client/v3/rooms/!0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171/leave => 200 OK (23.643394ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (19.05725ms) federation_room_join_partial_state_test.go:3723: Alice's leave is received by the resident server federation_room_join_partial_state_test.go:4427: Cleaning up after test... federation_room_join_partial_state_test.go:4496: Replying to /state_ids request for event [$bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g] federation_room_join_partial_state_test.go:4529: Incoming state request for event [$bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g] in room !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 federation_room_join_partial_state_test.go:4537: Replying to /state request for event [$bktTP-VUFCYYjBE92q9rLxKnEnkERA6CL8evt3fpU5g] client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171/members => 200 OK (32.05937ms) federation_room_join_partial_state_test.go:4429: @user-51-t43alice:hs1's partial state join to !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 completed. federation_room_join_partial_state_test.go:156: host.docker.internal:45171: @user-51-t43alice:hs1 had already left test room !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171 before WithWaitForLeave ran. client.go:860: [CSAPI] POST hs1/_matrix/client/v3/rooms/!0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171/leave => 200 OK (15.093236ms) federation_room_join_partial_state_test.go:171: host.docker.internal:45171 timed out waiting for @user-51-t43alice:hs1 to leave test room !0-kuhoS2HynKMFoBaAVt:host.docker.internal:45171.

❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_newly_joined_servers_in_partial_state_rooms (4.67s) client.go:860: [CSAPI] POST hs1/_matrix/client/v3/register => 200 OK (14.497077ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/capabilities => 200 OK (6.319961ms) server.go:210: Creating room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 with version 10 federation_room_join_partial_state_test.go:4510: Registered state_ids handler for event $kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc federation_room_join_partial_state_test.go:4551: Registered /state handler for event $kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc 2026/06/09 08:47:43 Received send-join of event $eCDCY848myJfso3EUaOp0tSD-oYrAaRoEM0uKmV8QQ4 client.go:860: [CSAPI] POST hs1/_matrix/client/v3/join/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 => 200 OK (118.335705ms) federation_room_join_partial_state_test.go:4404: /join request completed federation_room_join_partial_state_test.go:4489: Incoming state_ids request for event [$kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc] in room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/HJZGHFCAOA => 200 OK (86.732122ms) federation_room_join_partial_state_test.go:2294: @user-33-t24alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 1","device_id":"HJZGHFCAOA","prev_id":[],"stream_id":41,"user_id":"@user-33-t24alice:hs1"} federation_room_join_partial_state_test.go:2297: @charlie and @derek received device list update. 2026/06/09 08:47:44 Received send-join of event $aIVc_eE8-6DBmfRIR6IfFdu7nBYl8YBfHeGcbcy_Hbk federation_room_join_partial_state_test.go:2300: Server.MustJoinRoom joined room ID !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (68.678334ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (10.852562ms) federation_room_join_partial_state_test.go:2313: Alice successfully received event $aIVc_eE8-6DBmfRIR6IfFdu7nBYl8YBfHeGcbcy_Hbk via /sync client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/HJZGHFCAOA => 200 OK (7.263855ms) federation_room_join_partial_state_test.go:2316: @user-33-t24alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 2","device_id":"HJZGHFCAOA","prev_id":[],"stream_id":43,"user_id":"@user-33-t24alice:hs1"} federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 2","device_id":"HJZGHFCAOA","prev_id":[41],"stream_id":43,"user_id":"@user-33-t24alice:hs1"} federation_room_join_partial_state_test.go:2319: @charlie, @derek and @elsie received device list update. federation_room_join_partial_state_test.go:4496: Replying to /state_ids request for event [$kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc] federation_room_join_partial_state_test.go:4529: Incoming state request for event [$kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc] in room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 federation_room_join_partial_state_test.go:4537: Replying to /state request for event [$kLwIKis2rqHT0iYKhrlPl9ANQbbQZCNJIh0QcHG1-Wc] client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483/members => 200 OK (76.347531ms) federation_room_join_partial_state_test.go:2323: @user-33-t24alice:hs1's partial state join to !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 completed. client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/HJZGHFCAOA => 200 OK (6.628917ms) federation_room_join_partial_state_test.go:2326: @user-33-t24alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 3","device_id":"HJZGHFCAOA","prev_id":[43],"stream_id":46,"user_id":"@user-33-t24alice:hs1"} federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 2","device_id":"HJZGHFCAOA","prev_id":[43],"stream_id":44,"user_id":"@user-33-t24alice:hs1"} federation_room_join_partial_state_test.go:2329: @charlie, @derek and @elsie received device list update. federation_room_join_partial_state_test.go:156: host.docker.internal:39381: @user-33-t24alice:hs1 had already left test room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 before WithWaitForLeave ran. federation_room_join_partial_state_test.go:4427: Cleaning up after test... client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483/members => 200 OK (7.654741ms) federation_room_join_partial_state_test.go:4429: @user-33-t24alice:hs1's partial state join to !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 completed. federation_room_join_partial_state_test.go:2167: Complement server received m.device_list_update: {"device_display_name":"A new device name 3","device_id":"HJZGHFCAOA","prev_id":[44],"stream_id":46,"user_id":"@user-33-t24alice:hs1"} client.go:860: [CSAPI] POST hs1/_matrix/client/v3/rooms/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483/leave => 200 OK (31.443572ms) federation_room_join_partial_state_test.go:169: host.docker.internal:40483 saw @user-33-t24alice:hs1 leave test room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483. federation_room_join_partial_state_test.go:169: host.docker.internal:39381 saw @user-33-t24alice:hs1 leave test room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483. federation_room_join_partial_state_test.go:4427: Cleaning up after test... client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483/members => 200 OK (5.144066ms) federation_room_join_partial_state_test.go:4429: @user-33-t24alice:hs1's partial state join to !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 completed. federation_room_join_partial_state_test.go:156: host.docker.internal:40483: @user-33-t24alice:hs1 had already left test room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483 before WithWaitForLeave ran. client.go:860: [CSAPI] POST hs1/_matrix/client/v3/rooms/!0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483/leave => 200 OK (8.149377ms) federation_room_join_partial_state_test.go:171: host.docker.internal:40483 timed out waiting for @user-33-t24alice:hs1 to leave test room !0-C7eWPIF3FWzfgDTjDj:host.docker.internal:40483.

Oh, hmm, sorry, could have sworn I saw the tests pass.

MadLittleMods · 2026-06-09T19:54:39Z

 		delete(s.eduHandlers, eduHandlerKey)
 	}
 }



For reference, can you paste the full test run flake?

https://github.com/element-hq/synapse/actions/runs/27136501582/job/80090514774?pr=19832

📦 github.com/matrix-org/complement/tests/msc3902 2026/06/08 12:22:24 config: &{BaseImageURI:localhost/complement-synapse DebugLoggingEnabled:false AlwaysPrintServerLogs:false EnvVarsPropagatePrefix:PASS_ SpawnHSTimeout:30s ContainerCPUCores:0 ContainerMemoryBytes:0 KeepBlueprints:[] HostMounts:[] BaseImageURIs:map[] PackageNamespace:msc3902 CACertificate:0xc000964c08 CAPrivateKey:0xc000804380 BestEffort:false HostnameRunningComplement:host.docker.internal EnableDirtyRuns:true HSPortBindingIP:127.0.0.1 PostTestScript:} ❌ TestPartialStateJoin (1m56.99s) ❌ TestPartialStateJoin/Outgoing_device_list_updates (19.95s) ❌ TestPartialStateJoin/Outgoing_device_list_updates/Device_list_updates_reach_incorrectly_kicked_servers_once_partial_state_join_completes (4.2s) client.go:860: [CSAPI] POST hs1/_matrix/client/v3/register => 200 OK (15.620036ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/capabilities => 200 OK (3.801544ms) server.go:210: Creating room !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 with version 10 federation_room_join_partial_state_test.go:4499: Registered state_ids handler for event $mN1voF4gDGPdTSp3EUwOmCDlOFqlzgXW_KUR-AUXZ8U federation_room_join_partial_state_test.go:4540: Registered /state handler for event $mN1voF4gDGPdTSp3EUwOmCDlOFqlzgXW_KUR-AUXZ8U 2026/06/08 12:23:47 Received send-join of event $kEyw4F8XinpYV9_VahFs5JkXlLv0JIgGb0MkavOKyjE client.go:860: [CSAPI] POST hs1/_matrix/client/v3/join/!0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 => 200 OK (80.730602ms) federation_room_join_partial_state_test.go:4393: /join request completed federation_room_join_partial_state_test.go:4478: Incoming state_ids request for event [$mN1voF4gDGPdTSp3EUwOmCDlOFqlzgXW_KUR-AUXZ8U] in room !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 2026/06/08 12:23:48 Received send-join of event $awFsIhzHfpfMVd_m_ei2qJfZt-YtGhCjhTYrYJzq9U0 federation_room_join_partial_state_test.go:2405: Server.MustJoinRoom joined room ID !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (49.114711ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (9.370922ms) federation_room_join_partial_state_test.go:2415: Alice successfully received event $awFsIhzHfpfMVd_m_ei2qJfZt-YtGhCjhTYrYJzq9U0 via /sync client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/GPHZZFZGEP => 200 OK (4.413737ms) federation_room_join_partial_state_test.go:2418: @user-35-t26alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 1","device_id":"GPHZZFZGEP","prev_id":[],"stream_id":54,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 1","device_id":"GPHZZFZGEP","prev_id":[],"stream_id":54,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2421: @charlie, @derek and @elsie received device list update. client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (6.652265ms) client.go:860: [CSAPI] GET hs1/_matrix/client/v3/sync => 200 OK (48.310036ms) federation_room_join_partial_state_test.go:2439: Alice successfully received event $SxL9gU1hmed77R46CGYKccn6aDKuZBFGFcKN2eBkKRc via /sync client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/GPHZZFZGEP => 200 OK (5.036587ms) federation_room_join_partial_state_test.go:2497: @user-35-t26alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 2","device_id":"GPHZZFZGEP","prev_id":[54],"stream_id":56,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2500: @charlie and @derek received device list update. federation_room_join_partial_state_test.go:4485: Replying to /state_ids request for event [$mN1voF4gDGPdTSp3EUwOmCDlOFqlzgXW_KUR-AUXZ8U] client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563/members => 200 OK (69.344577ms) federation_room_join_partial_state_test.go:2513: @user-35-t26alice:hs1's partial state join to !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 completed. federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 2","device_id":"GPHZZFZGEP","prev_id":[54],"stream_id":57,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2517: @elsie received missed device list update. client.go:860: [CSAPI] PUT hs1/_matrix/client/v3/devices/GPHZZFZGEP => 200 OK (5.751307ms) federation_room_join_partial_state_test.go:2520: @user-35-t26alice:hs1 sent device list update. federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 3","device_id":"GPHZZFZGEP","prev_id":[56],"stream_id":59,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2156: Complement server received m.device_list_update: {"device_display_name":"A new device name 3","device_id":"GPHZZFZGEP","prev_id":[57],"stream_id":59,"user_id":"@user-35-t26alice:hs1"} federation_room_join_partial_state_test.go:2523: @charlie, @derek and @elsie received device list update. federation_room_join_partial_state_test.go:4416: Cleaning up after test... client.go:860: [CSAPI] GET hs1/_matrix/client/v3/rooms/!0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563/members => 200 OK (3.937128ms) federation_room_join_partial_state_test.go:4418: @user-35-t26alice:hs1's partial state join to !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563 completed. client.go:860: [CSAPI] POST hs1/_matrix/client/v3/rooms/!0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563/leave => 200 OK (25.974991ms) federation_room_join_partial_state_test.go:156: host.docker.internal:45563 saw @user-35-t26alice:hs1 leave test room !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563. federation_room_join_partial_state_test.go:152: host.docker.internal:33565 has already seen @user-35-t26alice:hs1 leave test room !0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563. federation_room_join_partial_state_test.go:77: Received unexpected PDU: {"auth_events":["$613ehdee8-7NYiEo9wLU_E89o8bDbIvOvNdMfB8c_aw","$kEyw4F8XinpYV9_VahFs5JkXlLv0JIgGb0MkavOKyjE","$jnQmT8p0NUxGgUChevtHR2Qu027MlckWRQLfTsnaRXs"],"content":{"membership":"leave"},"depth":11,"hashes":{"sha256":"oaWwqeddMuOgqMSQs/IDHmDxHcxwNdjTTVJrhcHk0JM"},"origin_server_ts":1780921429379,"prev_events":["$SxL9gU1hmed77R46CGYKccn6aDKuZBFGFcKN2eBkKRc"],"room_id":"!0-hvmfClz7gk1ghOQTi5:host.docker.internal:45563","sender":"@user-35-t26alice:hs1","signatures":{"hs1":{"ed25519:a_zXSM":"y5zkhzV66kRDjAI1A/BUHRHnz7Ww1dki3S3o3nza3tBOnNOBA2E/C7Lf7WdOfiPTR9VLstNNufapfqaDYWhECA"}},"state_key":"@user-35-t26alice:hs1","type":"m.room.member"}

Co-authored-by: Eric Eastwood <erice@element.io>

erikjohnston force-pushed the erikj/fix_flakey_fed_device_lists branch from 27a2bb1 to 59d4118 Compare June 8, 2026 18:40

erikjohnston marked this pull request as ready for review June 8, 2026 20:11

erikjohnston requested review from a team as code owners June 8, 2026 20:11

erikjohnston force-pushed the erikj/fix_flakey_fed_device_lists branch from 59d4118 to b744d2d Compare June 9, 2026 08:43

MadLittleMods reviewed Jun 9, 2026

View reviewed changes

Update tests/msc3902/federation_room_join_partial_state_test.go

b48b4eb

Co-authored-by: Eric Eastwood <erice@element.io>

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Fix race in `WithWaitForLeave` that flaked `TestPartialStateJoin/Outgoing_device_list_updates`#878

Fix race in `WithWaitForLeave` that flaked `TestPartialStateJoin/Outgoing_device_list_updates`#878
erikjohnston wants to merge 2 commits into
mainfrom
erikj/fix_flakey_fed_device_lists

erikjohnston commented Jun 8, 2026 •

edited

Loading

Uh oh!

MadLittleMods Jun 9, 2026

Uh oh!

erikjohnston Jun 9, 2026

Uh oh!

Uh oh!

MadLittleMods Jun 9, 2026

Uh oh!

erikjohnston Jun 9, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

Conversation

erikjohnston commented Jun 8, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Background

Root cause

Fix

Uh oh!

MadLittleMods Jun 9, 2026

Choose a reason for hiding this comment

Uh oh!

erikjohnston Jun 9, 2026

Choose a reason for hiding this comment

Uh oh!

Uh oh!

MadLittleMods Jun 9, 2026

Choose a reason for hiding this comment

Uh oh!

erikjohnston Jun 9, 2026

Choose a reason for hiding this comment

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

erikjohnston commented Jun 8, 2026 •

edited

Loading