tst_QSharedMemory::readOnly fails on macOS 10.11

agent:2017/04/05 00:19:58 build.go:270: [make check -j1] 900 1200
cd .. && /Users/qt/work/qt/qtbase/tests/auto/corelib/kernel/qsharedmemory/test/target_wrapper.sh  ./tst_qsharedmemory readOnly
********* Start testing of tst_QSharedMemory *********
Config: Using QtTest library 5.9.0, Qt 5.9.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 8.0.0 (clang-800.0.42.1) (Apple))
PASS   : tst_QSharedMemory::initTestCase()
QDEBUG : tst_QSharedMemory::readOnly() shmget failed No such file or directory
FAIL!  : tst_QSharedMemory::readOnly() Compared values are not the same
   Actual   (p.error())        : Timedout
   Expected (QProcess::Crashed): Crashed
   Loc: [tst_qsharedmemory.cpp(469)]
QWARN  : tst_QSharedMemory::readOnly() QProcess: Destroyed while process ("/Users/qt/work/qt/qtbase/tests/auto/corelib/kernel/qsharedmemory/helperbinary") is still running.
PASS   : tst_QSharedMemory::cleanupTestCase()
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 38420ms
********* Finished testing of tst_QSharedMemory *********
make: *** [check] Error 1