REG: QString() == nullptr is false, was true

/home/qt/work/qt/qtmultimedia/tests/auto/integration/qaudiodeviceinfo/target_wrapper.sh  ./tst_qaudiodeviceinfo -o /home/qt/work/testresults/tests/auto/integration/qaudiodeviceinfo320936508,xml -o -,txt
 ********* Start testing of tst_QAudioDeviceInfo *********
 Config: Using QtTest library 5.8.0, Qt 5.8.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.8.2)
 PASS   : tst_QAudioDeviceInfo::initTestCase()
 PASS   : tst_QAudioDeviceInfo::checkAvailableDefaultInput()
 PASS   : tst_QAudioDeviceInfo::checkAvailableDefaultOutput()
 PASS   : tst_QAudioDeviceInfo::codecs()
 PASS   : tst_QAudioDeviceInfo::channels()
 PASS   : tst_QAudioDeviceInfo::sampleSizes()
 PASS   : tst_QAudioDeviceInfo::byteOrders()
 PASS   : tst_QAudioDeviceInfo::sampleTypes()
 PASS   : tst_QAudioDeviceInfo::sampleRates()
 PASS   : tst_QAudioDeviceInfo::isFormatSupported()
 PASS   : tst_QAudioDeviceInfo::preferred()
 PASS   : tst_QAudioDeviceInfo::nearest()
 PASS   : tst_QAudioDeviceInfo::supportedChannelCounts()
 PASS   : tst_QAudioDeviceInfo::supportedSampleRates()
 FAIL!  : tst_QAudioDeviceInfo::assignOperator() 'dev.deviceName() == NULL' returned FALSE. ()
    Loc: [tst_qaudiodeviceinfo.cpp(193)]
 PASS   : tst_QAudioDeviceInfo::deviceName()
 FAIL!  : tst_QAudioDeviceInfo::defaultConstructor() 'dev.deviceName() == NULL' returned FALSE. ()
    Loc: [tst_qaudiodeviceinfo.cpp(216)]
 PASS   : tst_QAudioDeviceInfo::equalityOperator()
 PASS   : tst_QAudioDeviceInfo::cleanupTestCase()
 Totals: 17 passed, 2 failed, 0 skipped, 0 blacklisted, 278ms
 ********* Finished testing of tst_QAudioDeviceInfo *********