cmd/dlv: bugfix: trace disables terminal echo

Fixes #397

cmd/dlv/main.go

@@ -256,7 +256,9 @@ func traceCmd(cmd *cobra.Command, args []string) {
 		}
 		cmds := terminal.DebugCommands(client)
 		cmd := cmds.Find("continue")
-		err = cmd(terminal.New(client, nil), "")
+		t := terminal.New(client, nil)
+		defer t.Close()
+		err = cmd(t, "")
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
 			return 1

terminal/terminal.go

@@ -41,9 +41,13 @@ func New(client service.Client, conf *config.Config) *Term {
 	}
 }
 
+func (t *Term) Close() {
+	t.line.Close()
+}
+
 // Run begins running dlv in the terminal.
 func (t *Term) Run() (int, error) {
-	defer t.line.Close()
+	defer t.Close()
 
 	// Send the debugger a halt command on SIGINT
 	ch := make(chan os.Signal)