Fix crash in processing of distribution list recipients.

app/src/main/java/org/thoughtcrime/securesms/messagedetails/MessageDetailsRepository.java

@@ -22,6 +22,7 @@ import org.thoughtcrime.securesms.database.model.MessageId;
 import org.thoughtcrime.securesms.database.model.MessageRecord;
 import org.thoughtcrime.securesms.dependencies.ApplicationDependencies;
 import org.thoughtcrime.securesms.recipients.Recipient;
+import org.thoughtcrime.securesms.recipients.RecipientId;
 
 import java.util.LinkedList;
 import java.util.List;
@@ -86,7 +87,7 @@ public final class MessageDetailsRepository {
     } else {
       List<GroupReceiptDatabase.GroupReceiptInfo> receiptInfoList = SignalDatabase.groupReceipts().getGroupReceiptInfo(messageRecord.getId());
 
-      if (receiptInfoList.isEmpty()) {
+      if (receiptInfoList.isEmpty() && messageRecord.getRecipient().isGroup()) {
         List<Recipient> group = SignalDatabase.groups().getGroupMembers(messageRecord.getRecipient().requireGroupId(), GroupDatabase.MemberSet.FULL_MEMBERS_EXCLUDING_SELF);
 
         for (Recipient recipient : group) {
@@ -98,6 +99,19 @@ public final class MessageDetailsRepository {
                                                      getNetworkFailure(messageRecord, recipient),
                                                      getKeyMismatchFailure(messageRecord, recipient)));
         }
+      } else if (receiptInfoList.isEmpty() && messageRecord.getRecipient().isDistributionList()) {
+        List<RecipientId> distributionList = SignalDatabase.distributionLists().getMembers(messageRecord.getRecipient().requireDistributionListId());
+        List<Recipient>   resolved         = Recipient.resolvedList(distributionList);
+
+        for (Recipient recipient : resolved) {
+          recipients.add(new RecipientDeliveryStatus(messageRecord,
+                                                     recipient,
+                                                     RecipientDeliveryStatus.Status.UNKNOWN,
+                                                     false,
+                                                     messageRecord.getReceiptTimestamp(),
+                                                     getNetworkFailure(messageRecord, recipient),
+                                                     getKeyMismatchFailure(messageRecord, recipient)));
+        }
       } else {
         for (GroupReceiptDatabase.GroupReceiptInfo info : receiptInfoList) {
           Recipient           recipient        = Recipient.resolved(info.getRecipientId());