Fixed ws dial input error being dropped

internal/cli/ws/dial.go

@@ -321,14 +321,17 @@ func interact(
 	}()
 
 	// Reading input can't be interrupted, so it has a goroutine of its own,
-	// left blocked if ctx is cancelled first.
+	// left blocked if ctx is cancelled first. Its error, if any, is sent
+	// before lines is closed.
 	lines := make(chan string)
+	inputErr := make(chan error, 1)
 	go func() {
 		defer close(lines)
 		scanner := bufio.NewScanner(input)
 		for scanner.Scan() {
 			lines <- scanner.Text()
 		}
+		inputErr <- scanner.Err()
 	}()
 
 	for {
@@ -339,6 +342,11 @@ func interact(
 			return err
 		case line, ok := <-lines:
 			if !ok {
+				err := <-inputErr
+				if err != nil {
+					return fmt.Errorf("reading input: %w", err)
+				}
+
 				// The end of input: stop sending, keep listening.
 				lines = nil
 				continue