Valgrind failure in c_threaderciser test

7: Test timeout computed to be: 6000
7: threaderciser start: threads=8, time=1, actions=[listen, close-listen, connect, close-connect, wake, timeout, cancel-timeout]
7: ==7576== 2,320 (1,408 direct, 912 indirect) bytes in 1 blocks are definitely lost in loss record 148 of 156
7: ==7576==    at 0x483BB1A: calloc (vg_replace_malloc.c:760)
7: ==7576==    by 0x4854315: pn_listener (epoll.c:1617)
7: ==7576==    by 0x402C9C: listener_ctx_new (threaderciser.c:264)
7: ==7576==    by 0x402C9C: lpool_listen.part.0 (threaderciser.c:282)
7: ==7576==    by 0x40338B: lpool_listen (threaderciser.c:379)
7: ==7576==    by 0x40338B: global_do_stuff (threaderciser.c:379)
7: ==7576==    by 0x40360F: handle (threaderciser.c:414)
7: ==7576==    by 0x40360F: proactor_thread (threaderciser.c:476)
7: ==7576==    by 0x48D34E1: start_thread (pthread_create.c:479)
7: ==7576==    by 0x49ED6C2: clone (clone.S:95)
7: ==7576== 
7: ==7576== 95,957 (1,128 direct, 94,829 indirect) bytes in 1 blocks are definitely lost in loss record 156 of 156
7: ==7576==    at 0x483980B: malloc (vg_replace_malloc.c:307)
7: ==7576==    by 0x402C94: listener_ctx_new (threaderciser.c:263)
7: ==7576==    by 0x402C94: lpool_listen.part.0 (threaderciser.c:282)
7: ==7576==    by 0x40338B: lpool_listen (threaderciser.c:379)
7: ==7576==    by 0x40338B: global_do_stuff (threaderciser.c:379)
7: ==7576==    by 0x40368F: user_thread (threaderciser.c:397)
7: ==7576==    by 0x48D34E1: start_thread (pthread_create.c:479)
7: ==7576==    by 0x49ED6C2: clone (clone.S:95)
7: ==7576== 
1/1 Test #7: c-threaderciser ..................***Failed    5.75 sec

0% tests passed, 1 tests failed out of 1

Total Test time (real) =   5.76 sec

The following tests FAILED:
	  7 - c-threaderciser (Failed)
Errors while running CTest