[#2212] morph: Fix subscription restoration

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

CHANGELOG.md

@@ -26,6 +26,7 @@ Changelog for FrostFS Node
 - Set flag `mode` required for `frostfs-cli control shards set-mode` (#8)
 - Fix `dirty` suffix in debian package version (#53)
 - Prevent node process from killing by systemd when shutting down (#1465)
+- Restore subscriptions correctly on morph client switch (#2212)
 
 ### Removed
 ### Updated

pkg/morph/client/notifications.go

@@ -226,6 +226,7 @@ func (c *Client) restoreSubscriptions(cli *rpcclient.WSClient, endpoint string)
 
 	// notification events restoration
 	for contract := range c.subscribedEvents {
+		contract := contract // See https://github.com/nspcc-dev/neo-go/issues/2890
 		id, err = cli.SubscribeForExecutionNotifications(&contract, nil)
 		if err != nil {
 			c.logger.Error("could not restore notification subscription after RPC switch",
@@ -242,6 +243,7 @@ func (c *Client) restoreSubscriptions(cli *rpcclient.WSClient, endpoint string)
 	// notary notification events restoration
 	if c.notary != nil {
 		for signer := range c.subscribedNotaryEvents {
+			signer := signer // See https://github.com/nspcc-dev/neo-go/issues/2890
 			id, err = cli.SubscribeForNotaryRequests(nil, &signer)
 			if err != nil {
 				c.logger.Error("could not restore notary notification subscription after RPC switch",