Issue description

test_ctx_options fails and I’m unable to identify the reasons why. In particular, the part of the test that fails, located in test_ctx_options.cpp, is the second assert in:

    if (is_allowed_to_raise_priority ()) {
        rc = zmq_ctx_set (
          ctx_, ZMQ_THREAD_PRIORITY,
          1 /* any positive value different than the default will be ok */);
        assert (rc == 0);
        rc = zmq_ctx_get (ctx_, ZMQ_THREAD_PRIORITY);
        assert (rc == 1);
    }

I manually checked and the call to zmq_ctx_set ( ctx_, ZMQ_THREAD_PRIORITY, 1) is successful, returning 1. However, the call to rc = zmq_ctx_get (ctx_, ZMQ_THREAD_PRIORITY) returns the value 65,535. In the beginning I thought this value was a -1, indicating that the call to zmq_ctx_get failed.

After investigating the returned value, it seems that it is not a -1 as zmq_ctx_get returns an int and not a short int.

How could I debug this problem further? It may seem that the problem is in the way that priority is acquired?

Environment

• libzmq version (commit hash if unreleased): 4.3.0
• OS: Arch GNU/Linux The command ulimit -a shows:

-t: cpu time (seconds)              unlimited
-f: file size (blocks)              unlimited
-d: data seg size (kbytes)          unlimited
-s: stack size (kbytes)             8192
-c: core file size (blocks)         unlimited
-m: resident set size (kbytes)      unlimited
-u: processes                       63741
-n: file descriptors                1048576
-l: locked-in-memory size (kbytes)  65536
-v: address space (kbytes)          unlimited
-x: file locks                      unlimited
-i: pending signals                 63741
-q: bytes in POSIX msg queues       819200
-e: max nice                        40
-r: max rt priority                 0
-N 15:                              unlimited

What’s the actual result?

Command line output of the test:

PASS: tests/test_router_handover
./config/test-driver: line 107: 21636 Aborted                 (core dumped) "$@" > $log_file 2>&1
FAIL: tests/test_ctx_options
PASS: tests/test_unbind_wildcard

Contents of the test log:

lt-test_ctx_options: tests/test_ctx_options.cpp:116: void test_ctx_thread_opts(void*): Assertion `rc == 1' failed.