From 55a01df5c905dca2c0c32db14b82628bb43a79b0 Mon Sep 17 00:00:00 2001
From: Till Faelligen <2353100+S7evinK@users.noreply.github.com>
Date: Thu, 23 Nov 2023 12:51:50 +0100
Subject: [PATCH] Fix oopps

---
 federationapi/routing/leave.go | 23 +++++++++++++++++++++++
 go.mod                         |  2 +-
 go.sum                         |  4 ++--
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/federationapi/routing/leave.go b/federationapi/routing/leave.go
index 98a5810f0..c4b46af93 100644
--- a/federationapi/routing/leave.go
+++ b/federationapi/routing/leave.go
@@ -176,6 +176,29 @@ func SendLeave(
 	keys gomatrixserverlib.JSONVerifier,
 	roomID, eventID string,
 ) util.JSONResponse {
+	parsedRoomID, err := spec.NewRoomID(roomID)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusInternalServerError,
+			JSON: spec.InternalServerError{},
+		}
+	}
+	roomInfo, err := rsAPI.QueryRoomInfo(httpReq.Context(), *parsedRoomID)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusInternalServerError,
+			JSON: spec.InternalServerError{},
+		}
+	}
+	// Either the room does not exist or does not
+	// have any events.
+	if roomInfo == nil || roomInfo.IsStub() {
+		return util.JSONResponse{
+			Code: http.StatusOK,
+			JSON: struct{}{},
+		}
+	}
+
 	roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID)
 	if err != nil {
 		return util.JSONResponse{
diff --git a/go.mod b/go.mod
index 7b709a88e..709e679b8 100644
--- a/go.mod
+++ b/go.mod
@@ -22,7 +22,7 @@ require (
 	github.com/matrix-org/dugong v0.0.0-20210921133753-66e6b1c67e2e
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91
 	github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20231123112137-2369defc080e
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20231123113708-498c48650dc9
 	github.com/matrix-org/pinecone v0.11.1-0.20230810010612-ea4c33717fd7
 	github.com/matrix-org/util v0.0.0-20221111132719-399730281e66
 	github.com/mattn/go-sqlite3 v1.14.17
diff --git a/go.sum b/go.sum
index 213a5f166..13960a796 100644
--- a/go.sum
+++ b/go.sum
@@ -208,8 +208,8 @@ github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91 h1:s7fexw
 github.com/matrix-org/go-sqlite3-js v0.0.0-20220419092513-28aa791a1c91/go.mod h1:e+cg2q7C7yE5QnAXgzo512tgFh1RbQLC0+jozuegKgo=
 github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530 h1:kHKxCOLcHH8r4Fzarl4+Y3K5hjothkVW5z7T1dUM11U=
 github.com/matrix-org/gomatrix v0.0.0-20220926102614-ceba4d9f7530/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20231123112137-2369defc080e h1:+E3txSR4+DEo39eoTlVxo9lNXfjJ8f8iXsyYwr1Yugs=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20231123112137-2369defc080e/go.mod h1:M8m7seOroO5ePlgxA7AFZymnG90Cnh94rYQyngSrZkk=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20231123113708-498c48650dc9 h1:jf2D3nqdpb/AWyKPeNScYMphaf0FnmoqdulKmTz8484=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20231123113708-498c48650dc9/go.mod h1:M8m7seOroO5ePlgxA7AFZymnG90Cnh94rYQyngSrZkk=
 github.com/matrix-org/pinecone v0.11.1-0.20230810010612-ea4c33717fd7 h1:6t8kJr8i1/1I5nNttw6nn1ryQJgzVlBmSGgPiiaTdw4=
 github.com/matrix-org/pinecone v0.11.1-0.20230810010612-ea4c33717fd7/go.mod h1:ReWMS/LoVnOiRAdq9sNUC2NZnd1mZkMNB52QhpTRWjg=
 github.com/matrix-org/util v0.0.0-20221111132719-399730281e66 h1:6z4KxomXSIGWqhHcfzExgkH3Z3UkIXry4ibJS4Aqz2Y=