See:
https://testresults.qt.io/logs/qt/qtbase/1cdbd0bfad6c8e675c2a7d9413b77958bb5af5fa/LinuxUbuntu_16_04x86_64LinuxUbuntu_16_04x86_64GCCqtci-linux-Ubuntu-16.04-x86_64-2-b7ad9dDeveloperBuild_OutOfSourceBuild_QtLibInfix_QtNamespace_BuildExamples_Documentation/2a48a3b7dcb9652b1532a3ad14de7580b5b9b1ee/test_1532692414/log.txt.gz