From e2683a46c39ff43b7f9bd48a67713e0e3a0d627d Mon Sep 17 00:00:00 2001
From: snail <okniuys@gmail.com>
Date: Fri, 30 Jan 2015 11:15:43 +0800
Subject: [PATCH] remove needless 'debug.traceback' call in assert

Though the result is not used, 'debug.traceback' is called when 'succ' is true
---
 lualib/skynet.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index c4dd3578..63857259 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -401,7 +401,9 @@ local function yield_call(service, session)
 	watching_session[session] = service
 	local succ, msg, sz = coroutine_yield("CALL", session)
 	watching_session[session] = nil
-	assert(succ, debug.traceback())
+	if not succ then
+		error(debug.traceback())
+	end
 	return msg,sz
 end