qtbase test auto/dbus/qdbusconnection is flaky

agent:2019/07/02 10:23:03 build.go:207: ********* Start testing of tst_QDBusConnection *********
agent:2019/07/02 10:23:03 build.go:207: Config: Using QtTest library 6.0.0, Qt 6.0.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 8.2.0)
agent:2019/07/02 10:23:03 build.go:207: PASS   : tst_QDBusConnection::initTestCase()
agent:2019/07/02 10:23:03 build.go:207: PASS   : tst_QDBusConnection::noConnection()
agent:2019/07/02 10:23:03 build.go:207: PASS   : tst_QDBusConnection::connectToBus()
agent:2019/07/02 10:28:03 build.go:207: 
agent:2019/07/02 10:28:03 build.go:207: === Received signal at function time: 300001ms, total time: 300006ms, dumping stack ===
agent:2019/07/02 10:28:04 build.go:207: GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
agent:2019/07/02 10:28:04 build.go:207: Copyright (C) 2018 Free Software Foundation, Inc.
agent:2019/07/02 10:28:04 build.go:207: License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
agent:2019/07/02 10:28:04 build.go:207: This is free software: you are free to change and redistribute it.
agent:2019/07/02 10:28:04 build.go:207: There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
agent:2019/07/02 10:28:04 build.go:207: and "show warranty" for details.
agent:2019/07/02 10:28:04 build.go:207: This GDB was configured as "x86_64-linux-gnu".
agent:2019/07/02 10:28:04 build.go:207: Type "show configuration" for configuration details.
agent:2019/07/02 10:28:04 build.go:207: For bug reporting instructions, please see:
agent:2019/07/02 10:28:04 build.go:207: <http://www.gnu.org/software/gdb/bugs/>.
agent:2019/07/02 10:28:04 build.go:207: Find the GDB manual and other documentation resources online at:
agent:2019/07/02 10:28:04 build.go:207: <http://www.gnu.org/software/gdb/documentation/>.
agent:2019/07/02 10:28:04 build.go:207: For help, type "help".
agent:2019/07/02 10:28:04 build.go:207: Type "apropos word" to search for commands related to "word".
agent:2019/07/02 10:28:04 build.go:207: Attaching to process 30689
agent:2019/07/02 10:28:04 build.go:207: (gdb) === End of stack trace ===
agent:2019/07/02 10:28:04 build.go:207: QFATAL : tst_QDBusConnection::connectToPeer() Test function timed out
agent:2019/07/02 10:28:04 build.go:207: FAIL!  : tst_QDBusConnection::connectToPeer() Received a fatal error.
agent:2019/07/02 10:28:04 build.go:207:    Loc: [Unknown file(0)]
agent:2019/07/02 10:28:04 build.go:207: Totals: 3 passed, 1 failed, 0 skipped, 0 blacklisted, 300372ms
agent:2019/07/02 10:28:04 build.go:207: ********* Finished testing of tst_QDBusConnection *********
agent:2019/07/02 10:28:04 build.go:207: Makefile:322: recipe for target 'check' failed
agent:2019/07/02 10:28:04 build.go:207: make: *** [check] Aborted
agent:2019/07/02 10:28:04 build.go:240: Process finished with error: exit status 2
agent:2019/07/02 10:28:04 build.go:210: Error reading from stdout/err: exit status 2
agent:2019/07/02 10:28:24 runner.go:156: Re-running tests/auto/dbus/qdbusconnection with TESTARGS=connectToPeer
agent:2019/07/02 10:28:24 build.go:315: [make check -j1] 900 900
agent:2019/07/02 10:28:24 build.go:207: /home/qt/work/qt/qtbase/tests/auto/dbus/qdbusconnection/target_wrapper.sh  ./tst_qdbusconnection connectToPeer -maxwarnings 0
agent:2019/07/02 10:28:24 build.go:207: ********* Start testing of tst_QDBusConnection *********
agent:2019/07/02 10:28:24 build.go:207: Config: Using QtTest library 6.0.0, Qt 6.0.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 8.2.0)
agent:2019/07/02 10:28:24 build.go:207: PASS   : tst_QDBusConnection::initTestCase()
agent:2019/07/02 10:28:24 build.go:207: PASS   : tst_QDBusConnection::connectToPeer()
agent:2019/07/02 10:28:24 build.go:207: PASS   : tst_QDBusConnection::cleanupTestCase()
agent:2019/07/02 10:28:24 build.go:207: Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 3ms
agent:2019/07/02 10:28:24 build.go:207: ********* Finished testing of tst_QDBusConnection *********
agent:2019/07/02 10:28:25 runner.go:156: Re-running tests/auto/dbus/qdbusconnection with TESTARGS=connectToPeer
agent:2019/07/02 10:28:25 build.go:315: [make check -j1] 900 900
agent:2019/07/02 10:28:25 build.go:207: /home/qt/work/qt/qtbase/tests/auto/dbus/qdbusconnection/target_wrapper.sh  ./tst_qdbusconnection connectToPeer -maxwarnings 0
agent:2019/07/02 10:28:25 build.go:207: ********* Start testing of tst_QDBusConnection *********
agent:2019/07/02 10:28:25 build.go:207: Config: Using QtTest library 6.0.0, Qt 6.0.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 8.2.0)
agent:2019/07/02 10:28:25 build.go:207: PASS   : tst_QDBusConnection::initTestCase()
agent:2019/07/02 10:33:25 build.go:207: 
agent:2019/07/02 10:33:25 build.go:207: === Received signal at function time: 300001ms, total time: 300002ms, dumping stack ===
agent:2019/07/02 10:33:25 build.go:207: GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
agent:2019/07/02 10:33:25 build.go:207: Copyright (C) 2018 Free Software Foundation, Inc.
agent:2019/07/02 10:33:25 build.go:207: License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
agent:2019/07/02 10:33:25 build.go:207: This is free software: you are free to change and redistribute it.
agent:2019/07/02 10:33:25 build.go:207: There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
agent:2019/07/02 10:33:25 build.go:207: and "show warranty" for details.
agent:2019/07/02 10:33:25 build.go:207: This GDB was configured as "x86_64-linux-gnu".
agent:2019/07/02 10:33:25 build.go:207: Type "show configuration" for configuration details.
agent:2019/07/02 10:33:25 build.go:207: For bug reporting instructions, please see:
agent:2019/07/02 10:33:25 build.go:207: <http://www.gnu.org/software/gdb/bugs/>.
agent:2019/07/02 10:33:25 build.go:207: Find the GDB manual and other documentation resources online at:
agent:2019/07/02 10:33:25 build.go:207: <http://www.gnu.org/software/gdb/documentation/>.
agent:2019/07/02 10:33:25 build.go:207: For help, type "help".
agent:2019/07/02 10:33:25 build.go:207: Type "apropos word" to search for commands related to "word".
agent:2019/07/02 10:33:25 build.go:207: Attaching to process 30737
agent:2019/07/02 10:33:25 build.go:207: (gdb) === End of stack trace ===
agent:2019/07/02 10:33:25 build.go:207: QFATAL : tst_QDBusConnection::connectToPeer() [     0.000 F] default TestNamespace::QTest::WatchDog::run - Test function timed out
agent:2019/07/02 10:33:25 build.go:207: FAIL!  : tst_QDBusConnection::connectToPeer() Received a fatal error.
agent:2019/07/02 10:33:25 build.go:207:    Loc: [Unknown file(0)]
agent:2019/07/02 10:33:25 build.go:207: Totals: 1 passed, 1 failed, 0 skipped, 0 blacklisted, 300146ms
agent:2019/07/02 10:33:25 build.go:207: ********* Finished testing of tst_QDBusConnection *********
agent:2019/07/02 10:33:25 build.go:207: Makefile:322: recipe for target 'check' failed
agent:2019/07/02 10:33:25 build.go:207: make: *** [check] Aborted
agent:2019/07/02 10:33:25 build.go:240: Process finished with error: exit status 2
agent:2019/07/02 10:33:25 build.go:210: Error reading from stdout/err: exit status 2