Fix for multithreaded cancel

wolfSSL / wolfMQTT

wolfMQTT is a small, fast, portable MQTT client implementation, including support for TLS 1.3.

https://www.wolfssl.com

GNU General Public License v2.0

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Closed dgarske closed 2 years ago

dgarske commented 2 years ago

Fix for proper detection of message to cancel. A publish_obj may point to the internal ack, so also check against the pending list item. ZD13313.
Improve debugging code to allow reproduction of the cancel bug. Build using WOLFMQTT_TEST_CANCEL and run ./examples/multithread/multithread -T -q 1.