nyagos.promptで少し込み入った事をしていると、pipeで落ちる件の対策

prompt_panic.patch

diff --git a/main/lua.go b/main/lua.go
index 73e0d16..85d9172 100644
--- a/main/lua.go
+++ b/main/lua.go
@@ -47,6 +47,8 @@ const ERRMSG_CAN_NOT_USE_TWO_LUA_ON = "Can not use two Lua-command on the same p
 const ERRMSG_CAN_NOT_RUN_LUA_ON_BACKGROUND = "Can not run Lua-Command on background"
 
 func (this LuaFunction) Call(cmd *interpreter.Interpreter) (interpreter.ErrorLevel, error) {
+	newArgsHookLock.Lock()
+	defer newArgsHookLock.Unlock()
 	if cmd.IsBackGround {
 		fmt.Fprintf(os.Stderr, "%s: %s\n",
 			cmd.Args[0],
@@ -209,6 +211,8 @@ func newArgHook(it *interpreter.Interpreter, args []string) ([]string, error) {
 var orgOnCommandNotFound func(*interpreter.Interpreter, error) error
 
 func on_command_not_found(inte *interpreter.Interpreter, err error) error {
+	newArgsHookLock.Lock()
+	defer newArgsHookLock.Unlock()
 	L, Lok := inte.Tag.(lua.Lua)
 	if !Lok {
 		return errors.New("on_command_not_found: Interpreter.Tag is not lua instance")
diff --git a/main/nyagos.go b/main/nyagos.go
index 58393b4..e24f636 100644
--- a/main/nyagos.go
+++ b/main/nyagos.go
@@ -46,6 +46,8 @@ func nyagosPrompt(L lua.Lua) int {
 }
 
 func printPrompt(this *conio.LineEditor) (int, error) {
+	newArgsHookLock.Lock()
+	defer newArgsHookLock.Unlock()
 	it, it_ok := this.Tag.(*interpreter.Interpreter)
 	if !it_ok {
 		return 0, errors.New("nyagos.go: printPrompt: conio.LineEditor.Tag is not interpreter.Interpreter")