No event decoration if no decryption result

Riot/Modules/MatrixKit/Models/Room/MXKRoomBubbleComponent.m

@@ -204,14 +204,21 @@ - (EventEncryptionDecoration)encryptionDecorationForEvent:(MXEvent*)event roomSt
 
     // The encryption is in a good state.
     // Only show a warning badge if there are decryption trust issues.
-    switch (event.decryptionDecoration.color)
+    if (event.decryptionDecoration)
     {
-        case MXEventDecryptionDecorationColorRed:
-            return EventEncryptionDecorationRed;
-        case MXEventDecryptionDecorationColorGrey:
-            return EventEncryptionDecorationGrey;
-        case MXEventDecryptionDecorationColorNone:
-            return EventEncryptionDecorationNone;
+        switch (event.decryptionDecoration.color)
+        {
+            case MXEventDecryptionDecorationColorNone:
+                return EventEncryptionDecorationNone;
+            case MXEventDecryptionDecorationColorGrey:
+                return EventEncryptionDecorationGrey;
+            case MXEventDecryptionDecorationColorRed:
+                return EventEncryptionDecorationRed;
+        }
+    }
+    else
+    {
+        return EventEncryptionDecorationNone;
     }
 }
 

Riot/Modules/MatrixKit/Views/EncryptionInfoView/MXKEncryptionInfoView.m

@@ -196,7 +196,8 @@ - (void)updateTextViewText
         if (!safetyMessage)
         {
             // Use default copy if none is provided by the decryption decoration
-            safetyMessage = _mxEvent.decryptionDecoration.color != MXEventDecryptionDecorationColorNone ? [VectorL10n roomEventEncryptionInfoKeyAuthenticityNotGuaranteed] : [VectorL10n userVerificationSessionsListSessionTrusted];
+            BOOL isUntrusted = _mxEvent.decryptionDecoration && _mxEvent.decryptionDecoration.color != MXEventDecryptionDecorationColorNone;
+            safetyMessage = isUntrusted ? [VectorL10n roomEventEncryptionInfoKeyAuthenticityNotGuaranteed] : [VectorL10n userVerificationSessionsListSessionTrusted];
         }
 
         NSString *decryptionError;

changelog.d/pr-7471.bugfix

@@ -0,0 +1 @@
+Timeline: No event decoration if no decryption result