tst_QJSEngine::jsNumberClass fails in RHEL 7.4

/home/qt/work/qt/qtdeclarative/tests/auto/qml/qjsengine/target_wrapper.sh  ./tst_qjsengine jsNumberClass
[     0.000 D] qt.qpa.screen unknown - adding QXcbScreen(0x1091130, name="Virtual-1", geometry=1024x768+0+0, availableGeometry=1024x706+0+28, devicePixelRatio=1.0, logicalDpi=QPair(96.0,96.0), physicalSize=270.0x203.0mm, screenNumber=0, virtualSize=1024x768 (1024.0x768.0mm), orientation=Qt::ScreenOrientation(LandscapeOrientation), depth=24, refreshRate=60.0, root=278, windowManagerName="GNOME Shell") (Primary: true )
[     0.000 D] qt.qpa.screen unknown - primary output is "Virtual-1"
[     0.000 D] qt.qpa.input.devices unknown - XInput version 2.2 is available and Qt supports 2.2 or greater
[     0.000 D] qt.qpa.input.devices unknown - input device  Virtual core XTEST pointer ID 4
[     0.000 D] qt.qpa.input.devices unknown -    has 10 buttons
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Rel X" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Rel Y" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    it's a scrolling device
[     0.000 D] qt.qpa.input.devices unknown - input device  VirtualPS/2 VMware VMMouse ID 8
[     0.000 D] qt.qpa.input.devices unknown -    has 5 buttons
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Abs X" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Abs Y" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    it's a scrolling device
[     0.000 D] qt.qpa.input.devices unknown - input device  VirtualPS/2 VMware VMMouse ID 9
[     0.000 D] qt.qpa.input.devices unknown -    has 7 buttons
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Rel X" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Rel Y" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    has valuator "Rel Vert Wheel" recognized? true
[     0.000 D] qt.qpa.input.devices unknown -    it's a scrolling device
[     0.003 D] qt.qpa.gl unknown - Choosing xcb gl-integration based on following priority
 ("xcb_glx", "xcb_egl")
[     0.004 D] qt.qpa.gl unknown - Xcb GLX gl-integration created
[     0.005 D] qt.qpa.gl unknown - Xcb GLX gl-integration successfully initialized
********* Start testing of tst_QJSEngine *********
Config: Using QtTest library 5.9.2, Qt 5.9.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 6.3.1 20170216 (Red Hat 6.3.1-3))
PASS   : tst_QJSEngine::initTestCase()
FAIL!  : tst_QJSEngine::jsNumberClass() 'ret.isBool()' returned FALSE. ()
   Loc: [tst_qjsengine.cpp(2128)]
PASS   : tst_QJSEngine::cleanupTestCase()
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 4ms
********* Finished testing of tst_QJSEngine *********