From efde98d57e1a82015440a9c1697d506cba7866c7 Mon Sep 17 00:00:00 2001
From: Liam Fitzgerald <liam.fitzgerald@tlon.io>
Date: Mon, 19 Jul 2021 15:40:07 +1000
Subject: [PATCH] interface: prevent crash in reducers on new group DMs

Fixes urbit/landscape#1044
---
 pkg/interface/src/logic/reducers/group-update.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/interface/src/logic/reducers/group-update.ts b/pkg/interface/src/logic/reducers/group-update.ts
index a008b64c6..798ec3d2d 100644
--- a/pkg/interface/src/logic/reducers/group-update.ts
+++ b/pkg/interface/src/logic/reducers/group-update.ts
@@ -103,6 +103,9 @@ const addMembers = (json: GroupUpdate, state: GroupState): GroupState => {
   if ('addMembers' in json) {
     const { resource, ships } = json.addMembers;
     const resourcePath = resourceAsPath(resource);
+    if(!(resourcePath in state.groups)) {
+      return;
+    }
     for (const member of ships) {
       state.groups[resourcePath].members.add(member);
       if (