* If a client instance already sets `conn`, then `dialer` should be
  called for this `conn` anyway. `conn` may turn to invalidated state
  and thus we can check it with `dialer`.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

@@ -51,3 +51,3 @@
 	}
 
-	ctx, cancel := context.WithCancel(prm.ctx)
+	ctx, cancel := context.WithTimeout(prm.ctx, c.dialTimeout)

@@ -59,0 +60,4 @@
+	// We use a separate timer instead of context timeout because the latter
+	// would propagate to all subsequent read/write operations on the opened stream,
+	// which is not desired for the stream's lifecycle management.
+	dialTimeoutTimer := time.NewTimer(c.dialTimeout)

@@ -59,0 +61,4 @@
+	// would propagate to all subsequent read/write operations on the opened stream,
+	// which is not desired for the stream's lifecycle management.
+	dialTimeoutTimer := time.NewTimer(c.dialTimeout)
+	newStreamCh := make(chan interface{})

@@ -59,0 +75,4 @@
+		close(newStreamCh)
+	}()
+	select {
+	case <-dialTimeoutTimer.C:

@@ -56,3 +55,1 @@
-		ServerStreams: info.ServerStream(),
-		ClientStreams: info.ClientStream(),
-	}, toMethodName(info))
+	defer cancel()

@@ -59,0 +77,4 @@
+	select {
+	case <-dialTimeoutTimer.C:
+		select {
+		case <-newStreamCh: