From c8becd7ba500802bbb23b986108ad965d4f31df5 Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Tue, 26 Mar 2019 11:58:12 +0900
Subject: Room::canSwitchVersions(): return false on tombstoned rooms

A softer take on #306.
---
 lib/room.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/room.cpp')

diff --git a/lib/room.cpp b/lib/room.cpp
index ce7bae04..18dacbaa 100644
--- a/lib/room.cpp
+++ b/lib/room.cpp
@@ -600,6 +600,9 @@ void Room::markAllMessagesAsRead()
 
 bool Room::canSwitchVersions() const
 {
+    if (!successorId().isEmpty())
+        return false; // Noone can upgrade a room that's already upgraded
+
     // TODO, #276: m.room.power_levels
     const auto* plEvt =
             d->currentState.value({"m.room.power_levels", ""});
-- 
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