qtopcua test failure in '5.15'

agent:2020/03/13 07:06:00 build.go:546: Executing instruction 27 of 34 - RunQtUnitTest
agent:2020/03/13 07:06:00 build.go:707: Running tests in directory C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp
agent:2020/03/13 07:06:00 runner.go:74: Generating test results with TESTARGS=-o C:\Users\qt\work\testresults\tests\auto\clientSetupInCpp071315037,xml -o C:\Users\qt\work\testresults\tests\auto\clientSetupInCpp071315037-junit,xunitxml -o -,txt
agent:2020/03/13 07:06:00 build.go:382: [Mingw32-make check] 900 900
agent:2020/03/13 07:06:00 build.go:276: [Mingw32-make check] 900 900 false false
agent:2020/03/13 07:06:01 build.go:253: C:\Users\qt\work\install\bin\qmake.exe -o Makefile clientSetupInCpp.pro "INSTALL_PREFIX=\Users\qt\work\install"
agent:2020/03/13 07:06:02 build.go:253: Mingw32-make -f Makefile.Release check
agent:2020/03/13 07:06:02 build.go:253: Mingw32-make[1]: Entering directory 'C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp'
agent:2020/03/13 07:06:02 build.go:253: call C:\Users\qt\work\qt\qtopcua\tests\auto\clientSetupInCpp\target_wrapper.bat release\tst_clientSetupInCpp.exe -o C:\Users\qt\work\testresults\tests\auto\clientSetupInCpp071315037,xml -o C:\Users\qt\work\testresults\tests\auto\clientSetupInCpp071315037-junit,xunitxml -o -,txt -import "C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp/../../../src/plugins/declarative"
agent:2020/03/13 07:06:03 build.go:253: Server Path: "C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp/release/../../open62541-testserver/open62541-testserver.exe"
agent:2020/03/13 07:06:03 build.go:253: all auto tests rely on an open62541-based test-server
agent:2020/03/13 07:06:03 build.go:253: Mingw32-make[1]: *** [Makefile.Release:87: check] Error -1073740286
agent:2020/03/13 07:06:03 build.go:253: Mingw32-make[1]: Leaving directory 'C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp'
agent:2020/03/13 07:06:03 build.go:253: Mingw32-make: *** [Makefile:321: release-check] Error 2
agent:2020/03/13 07:06:03 build.go:304: Process finished with error: exit status 2
agent:2020/03/13 07:06:03 build.go:529: Executing scheduled instruction 1 of 2 - Upload all core dumps if there are some
agent:2020/03/13 07:06:03 build.go:437: Skip uploading core files because CORE_FILES_PATH is not set in the environment
agent:2020/03/13 07:06:03 build.go:534:
agent:2020/03/13 07:06:03 build.go:529: Executing scheduled instruction 2 of 2 - Upload test results
agent:2020/03/13 07:06:03 storageclient.go:494: Collecting test results, archiving and uploading them
agent:2020/03/13 07:06:03 result.go:177: Collecting 2 test results ...
agent:2020/03/13 07:06:03 build.go:534:
agent:2020/03/13 07:06:03 agent.go:272: Test failed
agent:2020/03/13 07:06:03 agent.go:202: ERROR building: exit status 2
INFO:workitem.py:610(870): Agent FINISHED FAIL: testing C:/Users/qt/work/qt/qtopcua/tests/auto/clientSetupInCpp: qt/qtopcua/9ac3ac27f8e0d6138dea35286335e7983a58f43c/WindowsWindows_7x86WindowsWindows_7x86Mingw73qtci-windows-7-x86-3-e3a3c4/38e61710d9b7b2988d1f268abe77dce97899ca45/Test
INFO:workitem.py:679(870): <a href="https://qtmetrics.intra.qt.io/d/nOAsINmZz/jimis-telegraf-vms?orgId=1&from=1584083145000&to=1584083164000&var-server=1583936124-16955">VM metrics</a>
INFO:workitem.py:681(870): <a href="https://qtmetrics.intra.qt.io/d/nOAsINNZz/jimis-telegraf-hosts?orgId=1&from=1584083145000&to=1584083164000&var-server=square-tuna">Host metrics</a>

Build log: https://testresults.qt.io/logs/qt/qtopcua/9ac3ac27f8e0d6138dea35286335e7983a58f43c/WindowsWindows_7x86WindowsWindows_7x86Mingw73qtci-windows-7-x86-3-e3a3c4/38e61710d9b7b2988d1f268abe77dce97899ca45/test_1584083085/log.txt.gz

Details: http://ci-files01-hki.intra.qt.io:8080/coin/integration/qt/tqtc-qt5/tasks/1584082617

Tested changes (refs/builds/qtci/tqtc/5.15/1584082616):
https://codereview.qt-project.org/c/qt/tqtc-qt5/+/293434 Update submodules on 'tqtc/5.15' in qt5
https://codereview.qt-project.org/c/qt/tqtc-qt5/+/293740 Merge branch 5.15 into tqtc/5.15