WiFiManager: wifiManager.autoConnect crashes ESP on MDNS.begin with Fatal exception 28(LoadProhibitedCause):

Basic Infos

Hardware

WiFimanager Branch/Release: Development Version 0.12.0 (per Arduino Library Manager) Hardware: NodeMcu 1.0 (ESP12-E module)

Core Version: Version 0.12.0 (per Arduino Library Manager) Downloaded the latest git and confirmed issue on it

Description

Problem description: If wifiManager.autoconnect is used to connect the esp8266, it crashes when MDNS.begin(…) is called

Settings in IDE

Module: NodeMcu 1.0 (ESP12-E module)

Additional libraries: ESP8266mDNS.h

Sketch

#include <Arduino.h>
#include <ESP8266mDNS.h>
#include <WiFiManager.h>

WiFiManager wifiManager;

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  WiFi.disconnect();
  wifiManager.autoConnect("DEVICE", "123456789");  //THIS CAUSES MNDS.being to crash
  /* // WORKS IF YOU USE THIS CODE BLOCK INSTEAD
  WiFi.begin("router", "password1234"); 
  while (WiFi.status() != WL_CONNECTED) { 
    Serial.print("."); 
    delay(1000);
  }
  */
  Serial.print("\nConnected to "); Serial.print(WiFi.SSID()); Serial.print(" ,IP address is "); Serial.print(WiFi.localIP()); Serial.print(" and signal strength is "); Serial.println(WiFi.RSSI());

  if (!MDNS.begin("hello")) { Serial.println("Error setting up MDNS responder!"); }
  else { Serial.println("Started MDNS"); }
  
}

void loop() {}

Debug Messages

USING WIFIMANAGER.AUTOCONNECT

rl�d⸮⸮|�⸮l⸮|⸮$⸮c|⸮⸮⸮⸮;⸮c⸮c⸮⸮g'⸮lng⸮⸮⸮bx⸮⸮l;l{lx⸮o⸮⸮d⸮⸮#g⸮|d⸮⸮#⸮⸮no⸮�$⸮⸮l ⸮ogl n{⸮⸮⸮gc⸮ls⸮⸮n#⸮d⸮⸮⸮c⸮l ⸮⸮g⸮*WM: 
*WM: AutoConnect
bcn 0
del if1
mode : sta(2c:3a:e8:43:17:f7)
*WM: Connecting as wifi client...
*WM: Using last saved values, should be faster
*WM: Connection result: 
*WM: 0
mode : sta(2c:3a:e8:43:17:f7) + softAP(2e:3a:e8:43:17:f7)
add if1
dhcp server start:(ip:192.168.4.1,mask:255.255.255.0,gw:192.168.4.1)
bcn 100
*WM: SET AP STA
*WM: 
*WM: Configuring access point... 
*WM: DEVICE
*WM: 123456789
*WM: AP IP address: 
*WM: 192.168.4.1
*WM: HTTP server started
add 1
aid 1
station: b0:70:2d:82:d3:90 join, AID = 1
*WM: Request redirected to captive portal
*WM: Handle root
*WM: Request redirected to captive portal
*WM: Handle root
*WM: Request redirected to captive portal
*WM: Handle root
scandone
*WM: Scan done
*WM: DUP AP: Router
*WM: DUP AP: Router
*WM: HP-Print-06-LaserJet 200
*WM: -40
*WM: Router
*WM: -54
*WM: Iro
*WM: -66
*WM: ASUS
*WM: -89
*WM: Sent config page
*WM: Request redirected to captive portal
*WM: Handle root
*WM: Request redirected to captive portal
*WM: Handle root
*WM: WiFi save
*WM: Sent wifi save page
*WM: Connecting to new AP
*WM: Connecting as wifi client...
scandone
switch to channel 6
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 5
cnt 

connected with Router, channel 6
dhcp client start...
ip:10.0.1.111,mask:255.255.255.0,gw:10.0.1.1
*WM: Connection result: 
*WM: 3
station: b0:70:2d:82:d3:90 leave, AID = 1
rm 1
bcn 0
del if1
pm open,type:2 0
mode : sta(2c:3a:e8:43:17:f7)
sl

**Connected to Router ,IP address is 10.0.1.111 and signal strength is -59
Fatal exception 28(LoadProhibitedCause):**
epc1=0x40225ba3, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000098, depc=0x00000000

Exception (28):
epc1=0x40225ba3 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000098 depc=0x00000000

ctx: cont 
sp: 3fff0670 end: 3fff0aa0 offset: 01a0

>>>stack>>>
3fff0810:  fffffffe 00000000 4010100f 3fff284c  
3fff0820:  4021ffd0 3fff1d5c 3fff145c 3fff3044  
3fff0830:  3fff2dfa 40231e47 3fff284c 3fff1344  
3fff0840:  00000000 40220c83 3ffee1ec 40106b9c  
3fff0850:  3fff2dfa 40104456 3fff1d5c 3fff3044  
3fff0860:  0000002e 3fff0f00 3fff1d5c 401043d1  
3fff0870:  3fff2db4 3ffe973d 3fff184f 40222a3f  
3fff0880:  3ffee8f8 3ffee9f0 40224b34 3fff0f35  
3fff0890:  3fff0f00 3fff0f00 3fff2db4 4010453d  
3fff08a0:  40211f93 3fff2db4 3fff2dfa 40211f9c  
3fff08b0:  00000008 3fff08e0 4022451b 3ffeea10  
3fff08c0:  3ffee9f0 40224b34 3ffee8f8 3fff2e08  
3fff08d0:  3fff2db4 3fff3368 3fff0f00 40218031  
3fff08e0:  005e0001 4000fb00 60000200 3fff0990  
3fff08f0:  00000018 3fff3368 3fff2db4 40218ab8  
3fff0900:  40222b38 3ffee1ec 00000000 00000000  
3fff0910:  3fff0984 00000001 00000000 00000002  
3fff0920:  3fff0e60 00000004 3ffe8a81 40219130  
3fff0930:  4023a9ba 3ffe8a95 3ffe8a81 3fff3364  
3fff0940:  00000000 3fff2db4 3fff2e20 40218af8  
3fff0950:  3fff0f00 3fff0980 00000004 3fff3364  
3fff0960:  00000016 3fff0f00 3fff3364 40218289  
3fff0970:  3fff0f00 3fff0980 00000004 40211ff8  
3fff0980:  00000494 0104a8c0 3fff105c 40212034  
3fff0990:  3fff3368 3fff0f00 3fff2ebc 4021835a  
3fff09a0:  3fff3314 3ffef76c 3fff0a50 00000020  
3fff09b0:  3fff0a1c 3fff0f00 3fff3364 40218533  
3fff09c0:  3fff0a1c 3ffe98d4 3fff0f00 402185bf  
3fff09d0:  3fff0900 00000001 3fff0a50 00000001  
3fff09e0:  3ffef724 3ffef768 3ffef724 402025ce  
3fff09f0:  00000000 3ffef768 3fff0a40 40100690  
3fff0a00:  3ffef98c 000003af 00000000 4020ad78  
3fff0a10:  00000000 3ffef768 3ffef750 fb0000e0  
3fff0a20:  00000000 3ffef768 3ffef724 3ffefa70  
3fff0a30:  00000000 3ffef768 3ffef724 4020386a  
3fff0a40:  3fff2d3c 3fff0a70 40202234 402026f0  
3fff0a50:  00000000 00000000 3ffef9b0 4020a1e0  
3fff0a60:  3fffdad0 3ffef768 3ffef9b0 40202128  
3fff0a70:  3ffe93b8 6f01000a 00000000 feefeffe  
3fff0a80:  feefeffe 00000000 3ffefa68 4020ae84  
3fff0a90:  feefeffe feefeffe 3ffefa80 40100710  
<<<stack<<<

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v4ceabea9
~ld
scandone
*WM: 
*WM: AutoConnect
*WM: Connecting as wifi client...
*WM: Using last saved values, should be faster
*WM: Connection result: 
*WM: 0
mode : sta(2c:3a:e8:43:17:f7) + softAP(2e:3a:e8:43:17:f7)
add if1
dhcp server start:(ip:192.168.4.1,mask:255.255.255.0,gw:192.168.4.1)
bcn 100
*WM: SET AP STA
*WM: 
*WM: Configuring access point... 
*WM: DEVICE
*WM: 123456789
*WM: AP IP address: 
*WM: 192.168.4.1
*WM: HTTP server started

Works fine when using WiFi.being(said, password)

Here is that output

1384, room 16 tail 8 chksum 0x2d csum 0x2d v4ceabea9 ~ld ;l�d⸮⸮|�⸮$⸮|⸮$⸮c|ǃ⸮⸮{⸮c⸮c⸮⸮og⸮l’o⸮⸮⸮#x⸮⸮l;l{lp⸮n⸮⸮d⸮⸮co⸮|l⸮⸮c⸮⸮‘o⸮�d⸮⸮$⸮no$’{⸮⸮⸮gc⸮ls⸮⸮’c⸮d܃⸮c⸮l`⸮⸮g⸮scandone …scandone state: 0 -> 2 (b0) .state: 2 -> 3 (0) state: 3 -> 5 (10) add 0 aid 5 cnt

connected with Router, channel 6 dhcp client start… ip:10.0.1.111,mask:255.255.255.0,gw:10.0.1.1

Connected to Router ,IP address is 10.0.1.111 and signal strength is -53 Started MDNS