From 29661a630854e89b0d551f3ca699792e9ddb5f9e Mon Sep 17 00:00:00 2001
From: tantive <tantive@tantive.org>
Date: Thu, 3 Jan 2019 20:40:57 +0100
Subject: [PATCH] Fixed "Guru Meditation Error: Core  1 panic'ed
 (LoadProhibited) . Exception was unhandled." (see
 https://github.com/espressif/esp-idf/issues/1467)

---
 src/AsyncTCP.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/AsyncTCP.cpp b/src/AsyncTCP.cpp
index e604095..f06cccc 100644
--- a/src/AsyncTCP.cpp
+++ b/src/AsyncTCP.cpp
@@ -281,7 +281,11 @@ typedef struct {
 
 static err_t _tcp_output_api(struct tcpip_api_call_data *api_call_msg){
     tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
-    msg->err = tcp_output(msg->pcb);
+    if(msg->pcb){
+      msg->err = tcp_output(msg->pcb);
+    } else {
+      msg->err = 0;
+    }
     return msg->err;
 }
 
@@ -1161,9 +1165,9 @@ void AsyncServer::end(){
         tcp_arg(_pcb, NULL);
         tcp_accept(_pcb, NULL);
         if(_in_lwip_thread){
-            tcp_abort(_pcb);
+            tcp_close(_pcb);
         } else {
-            _tcp_abort(_pcb);
+            _tcp_close(_pcb);
         }
         _pcb = NULL;
     }