From 60eff54d7a5f60abfb7f380fbd302b30dfc4150d Mon Sep 17 00:00:00 2001
From: M Hightower <27247790+mhightower83@users.noreply.github.com>
Date: Fri, 17 Apr 2020 11:34:18 -0700
Subject: [PATCH] Null pointer call from WiFiClient::localIP() to IPAddress

Fixes exception 28 in IPAddress(const ipv4_addr* fw_addr); with null ip_addr
pointer passed in by WiFiCient.cpp localIP(). I assumed that localIP()
was called shortly after _pcb became null.
---
 libraries/ESP8266WiFi/src/WiFiClient.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/ESP8266WiFi/src/WiFiClient.cpp b/libraries/ESP8266WiFi/src/WiFiClient.cpp
index 059c6c6635..abd277229f 100644
--- a/libraries/ESP8266WiFi/src/WiFiClient.cpp
+++ b/libraries/ESP8266WiFi/src/WiFiClient.cpp
@@ -367,7 +367,7 @@ uint16_t WiFiClient::remotePort()
 
 IPAddress WiFiClient::localIP()
 {
-    if (!_client)
+    if (!_client || !_client->getLocalAddress())
         return IPAddress(0U);
 
     return IPAddress(_client->getLocalAddress());
@@ -389,7 +389,7 @@ void WiFiClient::stopAll()
 }
 
 
-void WiFiClient::stopAllExcept(WiFiClient* except) 
+void WiFiClient::stopAllExcept(WiFiClient* except)
 {
     for (WiFiClient* it = _s_first; it; it = it->_next) {
         if (it != except) {