fix segfault

common/cpp/include/request/request_pool.h

common/cpp/src/request/request_pool.cpp

common/cpp/unittests/request/test_request_pool.cpp

examples/pipeline/in_to_out/in_to_out.cpp

examples/pipeline/in_to_out_python/in_to_out.py

...ples/producer/dummy-data-producer/dummy_data_producer.cpp

producer/api/cpp/include/producer/producer.h

producer/api/cpp/src/producer_impl.cpp

producer/api/cpp/unittests/mocking.h

producer/api/cpp/unittests/test_producer_impl.cpp

producer/api/python/asapo_producer.pyx.in

producer/api/python/asapo_wrappers.h

tests/automatic/producer/python_api/check_linux.sh

tests/automatic/producer/python_api/producer_api.py

...nual/python_tests/producer_wait_threads/asapo_producer.so

tests/manual/python_tests/producer_wait_threads/file1

...manual/python_tests/producer_wait_threads/producer_api.py

tests/manual/python_tests/producer_wait_threads/test.py