Threaderciser test valgrind error

 test 7
 Start 7: c-threaderciser
7: Test command: /opt/pyenv/shims/python3 "/home/travis/build/apache/qpid-proton/scripts/env.py" "--" "TEST_EXE_PREFIX=/usr/bin/valgrind --tool=memcheck --leak-check=full --error-exitcode=42 --quiet --suppressions=/home/travis/build/apache/qpid-proton/tests/valgrind.supp" "/usr/bin/valgrind" "--tool=memcheck" "--leak-check=full" "--error-exitcode=42" "--quiet" "--suppressions=/home/travis/build/apache/qpid-proton/tests/valgrind.supp" "/home/travis/build/apache/qpid-proton/build/c/tests/c-threaderciser"
7: Test timeout computed to be: 360
7: threaderciser start: threads=8, time=1, actions=[listen, close-listen, connect, close-connect, wake, timeout, cancel-timeout]
7: ==12926== 128,678 (1,128 direct, 127,550 indirect) bytes in 1 blocks are definitely lost in loss record 165 of 165
7: ==12926== at 0x483B7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
7: ==12926== by 0x10B110: listener_ctx_new (threaderciser.c:264)
7: ==12926== by 0x10B110: lpool_listen.part.0 (threaderciser.c:283)
7: ==12926== by 0x10B88B: lpool_listen (threaderciser.c:380)
7: ==12926== by 0x10B88B: global_do_stuff (threaderciser.c:380)
7: ==12926== by 0x10BBD7: user_thread (threaderciser.c:398)
7: ==12926== by 0x48AF608: start_thread (pthread_create.c:477)
7: ==12926== by 0x49EB102: clone (clone.S:95)
7: ==12926== 
 7/48 Test #7: c-threaderciser ..................***Failed 2.14 sec