Hi all

It seems to be the custom_free_function developed by Espressif's lately (The commit I've mentioned in a reply).

See: https://github.com/espressif/esp-idf/is ... 2104864696

pbuf_free: deallocating 0x3fcba7cc pbuf_free: custom_free_function 0x3fcba82c This looks interesting... custom_free_function seems to plausibly be a pointer to another data structure here. May be coincidence though. Another thing to check could be: When updating a library you must make sure that al...

ESP-IDF should give you a backtrace for that crash; if you run 'idf.py monitor' as your terminal it should automatically be decoded into something readable. What does that say? Also, the PC in the crash is '%u _' in ascii, so whatever function pointer you're overwriting, it seems to be overwritten ...

InstrFetchProhibited may be due to an invalid/corrupt function pointer being called. Reason for that could be any kind of memory/stack corruption happening. Especially after upgrading IDF and toolchain, it may be worth trying to increase tasks' stack sizes and to enable stack overflow checking if n...

Hi there, I've an issue that existed since I updated to ESP-IDF v5.0 (7+ months), which is a strange exception after calling a specific function from mbedtls. Brief: I'm the maintainer of H4 stack libraries, that includes a timer scheduler (H4), TCP wrapper to LwIP Raw APIs (H4AsyncTCP), MQTT client...

Hi there, I'm facing a very strange bug that causes InstrFetchProhibited or IllegalInstruction exceptions on ESP32's on a code that runs: - GCC 12.2.0 - ESP-IDF v5.1 - Mbedtls v3.4 - Esp-Lwip v2.1.3 - Arduino Core v3 (Custom build) Wherein the bug comes when the application tries to call `pbuf_free(...

ESP_igrr wrote:

Hamzah Hajeir wrote: Note I'm using v2.11, which is based on ESP-IDF v4.4.5.

Seems correct, all releases <=v4.x have used -std=gnu++11. So to summarize,

- IDF v4.4.x and lower — C++11
- IDF v5.0.x — C++20
- IDF v5.1.x — C++23
- (future) IDF v5.2.x — C++23 (expected)

Thank you, this makes full of sense.

ESP-IDF uses C++20 (with GCC 11.2) in v5.0.x and C++23 (with GCC 12.1) in v5.1. The next minor release, v5.2 is expected to use C++23 with GCC 13.1. Given that your question is related to Arduino-esp32, I think the relevant milestone is v3.0.0 release , which is going to use IDF v5.1.x and therefor...

Hi there, I maintain a full stack of Arduino libraries called (H4) that include H4AsyncTCP, H4AsyncMQTT, H4AsyncHTTP, H4AsyncWebserver, and H4Plugins. I'm interested to know when will be an upgrade to the default compile C++ standard, as the current is (C++11), so to feel free using features of newe...

Hi there,
I've submitted a post earlier indicating in was a strapping GPIO pin (4,5) may cause the issue, but it wasn't true.

The main cause in my setup was the supply power, i was powering it from the PC USB, it worked well with the lab's DC Power supply.