From 9f3baf2ee3e0157d2f3f37ffdafdce502a17f4ad Mon Sep 17 00:00:00 2001
From: Cloud Wu <cloudwu@gmail.com>
Date: Wed, 11 Nov 2015 15:06:10 +0800
Subject: [PATCH] fix issue #372

---
 skynet-src/skynet_error.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/skynet-src/skynet_error.c b/skynet-src/skynet_error.c
index 962ea597..856c4700 100644
--- a/skynet-src/skynet_error.c
+++ b/skynet-src/skynet_error.c
@@ -28,7 +28,7 @@ skynet_error(struct skynet_context * context, const char *msg, ...) {
 	va_start(ap,msg);
 	int len = vsnprintf(tmp, LOG_MESSAGE_SIZE, msg, ap);
 	va_end(ap);
-	if (len < LOG_MESSAGE_SIZE) {
+	if (len >=0 && len < LOG_MESSAGE_SIZE) {
 		data = skynet_strdup(tmp);
 	} else {
 		int max_size = LOG_MESSAGE_SIZE;
@@ -44,6 +44,11 @@ skynet_error(struct skynet_context * context, const char *msg, ...) {
 			skynet_free(data);
 		}
 	}
+	if (len < 0) {
+		skynet_free(data);
+		perror("vsnprintf error :");
+		return;
+	}
 
 
 	struct skynet_message smsg;