Bug in 'ListenerImpl'

[qclzdh]

Required information

Operating system:
E.g. Ubuntu 20.04 LTS

Compiler version:
E.g. GCC 9.4.0

Eclipse iceoryx version:
master

Observed result or behaviour:
process crashed

Expected result or behaviour:
process run normally

Conditions where it occurred / Performed steps:
change the examples as following, and then run it

diff --git a/iceoryx_examples/callbacks/ice_callbacks_subscriber.cpp b/iceoryx_examples/callbacks/ice_callbacks_subscriber.cpp
index e25cc5856..871a93432 100644
--- a/iceoryx_examples/callbacks/ice_callbacks_subscriber.cpp
+++ b/iceoryx_examples/callbacks/ice_callbacks_subscriber.cpp
@@ -76,10 +76,11 @@ int main()
 {
     iox::runtime::PoshRuntime::initRuntime(APP_NAME);
 
+std::cout << "test ListenerImpl " << std::endl;
     // the listener starts a background thread and the callbacks of the attached events
     // will be called in this background thread when they are triggered
     //! [create listener]
-    iox::popo::Listener listener;
+    iox::popo::ListenerImpl<10> listener;
     //! [create listener]
 
     //! [create heartbeat and subscribers]

[elBoberido]

Indded, there is an issue in the ListenerImpl when used directly but it is not meant to use directly. Only the Listener itself is public API. The ListenerImpl was created to try to fix an issue with the C binding which in the end did not work and should have been reverted.

Why exactly do you want to use the ListenerImpl instead of the Listener?