Environment

• Development Kit: ESP32-DevKitC
• Kit version: v1
• Module or chip used: ESP32-WROOM-32
• IDF version (run git describe --tags to find it): v4.2.2
• Build System: idf.py
• Compiler version (run xtensa-esp32-elf-gcc --version to find it): 8.4.0
• Operating System: Linux
• Using an IDE?: VSCode with the ESP-IDF extension
• Power Supply: USB

Problem Description

The pppos_client example in the esp_modem example crashes and issues a core dump while connected to mqtt. It happens when the mqtt client receives a message.

//Detailed problem description goes here.
I am running an ESP32 connected to a Monarch Sequans GSM, communicating through UART. Then after a while it suddenly issues a core dump when trying to handle a received message (normally on an incoming ping response). I have attached a photo of the core dump issue, and it seems like it occurs within the pppos.c file.

Code to reproduce this issue

The pppos_client_main.c example from the (esp_modem)[https://components.espressif.com/component/espressif/esp_modem] component (v.0.1.13). The only modification I have done to the code is removing the xEventGroupSet within the mqtt_handler to avoid disconnecting from the server.

Debug Logs