fix: handle network error on SETINFO

Author: ndyakov

Diff for: redis.go

@@ -359,7 +359,11 @@ func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 		p := conn.Pipeline()
 		p.ClientSetInfo(ctx, WithLibraryName(libName))
 		p.ClientSetInfo(ctx, WithLibraryVersion(libVer))
-		_, _ = p.Exec(ctx)
+		// Handle network errors (e.g. timeouts) in CLIENT SETINFO to avoid
+		// out of order responses later on.
+		if _, err = p.Exec(ctx); err != nil && !isRedisError(err) {
+			return err
+		}
 	}
 
 	if c.opt.OnConnect != nil {

Diff for: redis_test.go

@@ -370,6 +370,13 @@ var _ = Describe("Client timeout", func() {
 	})
 
 	testTimeout := func() {
+		It("SETINFO timeouts", func() {
+			conn := client.Conn()
+			err := conn.Ping(ctx).Err()
+			Expect(err).To(HaveOccurred())
+			Expect(err.(net.Error).Timeout()).To(BeTrue())
+		})
+
 		It("Ping timeouts", func() {
 			err := client.Ping(ctx).Err()
 			Expect(err).To(HaveOccurred())