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warning: object backing the pointer will be destroyed at the end of the full-expression #313

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@middlenebel

Hello, I found this warning compiling into a Dockerfile:

[ 75%] Building CXX object src/CMakeFiles/cppkafka.dir/producer.cpp.o
/app/cppkafka/src/producer.cpp:154:54: warning: object backing the pointer will be destroyed at the end of the full-expression [-Wdangling-gsl]
RD_KAFKA_V_TOPIC(message.get_topic().data()),
^~~~~~~~~~~~~~~~~~~
/usr/include/librdkafka/rdkafka.h:1152:60: note: expanded from macro 'RD_KAFKA_V_TOPIC'
_LRK_TYPECHECK(RD_KAFKA_VTYPE_TOPIC, const char *, topic),
^~~~~
/usr/include/librdkafka/rdkafka.h:115:47: note: expanded from macro '_LRK_TYPECHECK'
TYPE __t RD_UNUSED = (ARG);
^~~
1 warning generated.

Edit:

It was because of the Catch2 submodule, because I did a recursive update. With the current version in cppkafka it does not give that warning.

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