[lwip-users] Lockup with Raspberry Pi Pico

[Martin Edgar Furter Rathod]

Hello,

I have some problems with two different applications running on 
Raspberry Pi Pico. Both of them lockup after a while and the watchdog 
then makes a reset.

One of them is running on a Pico-W and uses WiFi. It is basically the 
NTP example plus some code around it to show the time.

The other implements Modbus-TCP. It uses a Pico and an ENC28J60. The 
driver for the network chip is the following one:
https://git.sr.ht/~krystianch/pico-enc28j60/tree/master

I've been using about 1.5 year old version of Pico-SDK and lwIP. A 
friend tried pretty much latest code and said it is much worse. His 
version locks up in less than a minute while mine runs quite a bit longer.

In a very very old email i read that it could be a double free or 
accessing freed buffers. Is there a HOWTO or some documentation how to 
debug such a situation?

Thank you,

- Martin