imapc: Fix handling UIDVALIDITY changes

Index was being correctly reset, but the transaction was rolled back.

src/lib-storage/index/imapc/imapc-mailbox.c

@@ -94,7 +94,7 @@ static int imapc_mailbox_commit_delayed_expunges(struct imapc_mailbox *mbox)
 }
 
 int imapc_mailbox_commit_delayed_trans(struct imapc_mailbox *mbox,
-				       bool *changes_r)
+				       bool force, bool *changes_r)
 {
 	int ret = 0;
 
@@ -104,7 +104,7 @@ int imapc_mailbox_commit_delayed_trans(struct imapc_mailbox *mbox,
 		mail_index_view_close(&mbox->delayed_sync_view);
 	if (mbox->delayed_sync_trans == NULL)
 		;
-	else if (!mbox->selected) {
+	else if (!mbox->selected && !force) {
 		/* ignore any changes done during SELECT */
 		mail_index_transaction_rollback(&mbox->delayed_sync_trans);
 	} else {
@@ -744,7 +744,7 @@ static void imapc_sync_uid_validity(struct imapc_mailbox *mbox)
 			/* The reset needs to be committed before FETCH 1:*
 			   results are received. */
 			bool changes;
-			if (imapc_mailbox_commit_delayed_trans(mbox, &changes) < 0)
+			if (imapc_mailbox_commit_delayed_trans(mbox, TRUE, &changes) < 0)
 				mail_index_mark_corrupted(mbox->box.index);
 			imapc_mailbox_init_delayed_trans(mbox);
 		}

src/lib-storage/index/imapc/imapc-storage.c

@@ -788,7 +788,7 @@ static void imapc_mailbox_close(struct mailbox *box)
 	struct imapc_mailbox *mbox = IMAPC_MAILBOX(box);
 	bool changes;
 
-	(void)imapc_mailbox_commit_delayed_trans(mbox, &changes);
+	(void)imapc_mailbox_commit_delayed_trans(mbox, FALSE, &changes);
 	imapc_mail_fetch_flush(mbox);
 	if (mbox->client_box != NULL)
 		imapc_client_mailbox_close(&mbox->client_box);

src/lib-storage/index/imapc/imapc-storage.h

@@ -192,7 +192,7 @@ void imapc_simple_run(struct imapc_simple_context *sctx);
 void imapc_simple_callback(const struct imapc_command_reply *reply,
 			   void *context);
 int imapc_mailbox_commit_delayed_trans(struct imapc_mailbox *mbox,
-				       bool *changes_r);
+				       bool force, bool *changes_r);
 void imapc_mailbox_noop(struct imapc_mailbox *mbox);
 void imapc_mailbox_set_corrupted(struct imapc_mailbox *mbox,
 				 const char *reason, ...) ATTR_FORMAT(2, 3);

src/lib-storage/index/imapc/imapc-sync.c

@@ -512,7 +512,7 @@ static int imapc_sync_finish(struct imapc_sync_context **_ctx)
 
 	/* this is done simply to commit delayed expunges if there are any
 	   (has to be done after sync is committed) */
-	if (imapc_mailbox_commit_delayed_trans(ctx->mbox, &changes) < 0)
+	if (imapc_mailbox_commit_delayed_trans(ctx->mbox, FALSE, &changes) < 0)
 		ctx->failed = TRUE;
 
 	i_free(ctx);
@@ -579,7 +579,7 @@ imapc_mailbox_sync_init(struct mailbox *box, enum mailbox_sync_flags flags)
 		/* initial FETCH failed already */
 		ret = -1;
 	}
-	if (imapc_mailbox_commit_delayed_trans(mbox, &changes) < 0)
+	if (imapc_mailbox_commit_delayed_trans(mbox, FALSE, &changes) < 0)
 		ret = -1;
 	if ((changes || mbox->sync_fetch_first_uid != 0 ||
 	     index_mailbox_want_full_sync(&mbox->box, flags)) &&