WARNING: ThreadSanitizer: data race 
  Write of size 1 at 0x000000000001 by thread T1:
    #0 control_senddone bin/named/controlconf.c:257:22
    #1 tcp_send_cb lib/isc/netmgr/tcp.c:1027:2
    #2 uv__write_callbacks /home/ondrej/Projects/tsan/libuv/src/unix/stream.c:953:7
    #3 uv__stream_io /home/ondrej/Projects/tsan/libuv/src/unix/stream.c:1330:5
    #4 uv__run_pending /home/ondrej/Projects/tsan/libuv/src/unix/core.c:812:5
    #5 uv_run /home/ondrej/Projects/tsan/libuv/src/unix/core.c:377:19
    #6 nm_thread lib/isc/netmgr/netmgr.c:500:11

  Previous write of size 1 at 0x000000000001 by thread T2:
    #0 control_senddone bin/named/controlconf.c:257:22
    #1 tcp_send_cb lib/isc/netmgr/tcp.c:1027:2
    #2 uv__write_callbacks /home/ondrej/Projects/tsan/libuv/src/unix/stream.c:953:7
    #3 uv__stream_io /home/ondrej/Projects/tsan/libuv/src/unix/stream.c:1330:5
    #4 uv__run_pending /home/ondrej/Projects/tsan/libuv/src/unix/core.c:812:5
    #5 uv_run /home/ondrej/Projects/tsan/libuv/src/unix/core.c:377:19
    #6 nm_thread lib/isc/netmgr/netmgr.c:500:11

  Location is heap block of size 265 at 0x000000000009 allocated by thread T3:
    #0 malloc <null>
    #1 default_memalloc lib/isc/mem.c:713:8
    #2 mem_get lib/isc/mem.c:622:8
    #3 isc___mem_get lib/isc/mem.c:1044:9
    #4 isc__mem_get lib/isc/mem.c:2432:10
    #5 add_listener bin/named/controlconf.c:1133:13
    #6 named_controls_configure bin/named/controlconf.c:1331:6
    #7 load_configuration bin/named/server.c:9133:2
    #8 run_server bin/named/server.c:9771:2
    #9 dispatch lib/isc/task.c:1152:7
    #10 run lib/isc/task.c:1344:2

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:73:8
    #2 isc_nm_start lib/isc/netmgr/netmgr.c:223:3
    #3 create_managers bin/named/main.c:909:15
    #4 setup bin/named/main.c:1223:11
    #5 main bin/named/main.c:1523:2

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:73:8
    #2 isc_nm_start lib/isc/netmgr/netmgr.c:223:3
    #3 create_managers bin/named/main.c:909:15
    #4 setup bin/named/main.c:1223:11
    #5 main bin/named/main.c:1523:2

  Thread T3 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:73:8
    #2 isc_taskmgr_create lib/isc/task.c:1434:3
    #3 create_managers bin/named/main.c:915:11
    #4 setup bin/named/main.c:1223:11
    #5 main bin/named/main.c:1523:2

SUMMARY: ThreadSanitizer: data race bin/named/controlconf.c:257:22 in control_senddone