Docker causes agent process to crash during provisioning

agent:2019/02/14 11:21:16 build.go:416: Running provisioning bash script: "/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/80-docker.sh"
++ dirname /var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/80-docker.sh
+ BASEDIR=/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64
+ /var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/macos/docker.sh
+ url=https://download.docker.com/mac/stable/DockerToolbox.pkg
+ target_file=DockerToolbox.pkg
++ command -v sha1sum
+ '[' -x /usr/local/bin/sha1sum ']'
+ case ${BASH_SOURCE[0]} in
+ UNIX_PATH=/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/unix
+ source /var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/unix/DownloadURL.sh
++ set -ex
+ url_cached=http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg
+ sha1=7196d2d30648d486978d29adb5837ff7876517c1
+ DownloadURL http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg https://download.docker.com/mac/stable/DockerToolbox.pkg 7196d2d30648d486978d29adb5837ff7876517c1 DockerToolbox.pkg
+ url=http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg
+ url_alt=https://download.docker.com/mac/stable/DockerToolbox.pkg
+ expectedSha1=7196d2d30648d486978d29adb5837ff7876517c1
+ targetFile=DockerToolbox.pkg
+ echo 'Downloading from primary URL '\''http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg'\'''
Downloading from primary URL 'http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg'
+ curl --fail -L --retry 5 --retry-delay 5 -o DockerToolbox.pkg http://ci-files01-hki.intra.qt.io/input/windows/DockerToolbox.pkg
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
 11  201M   11 23.4M    0     0  32.1M      0  0:00:06 --:--:--  0:00:06 32.1M
 40  201M   40 82.5M    0     0  48.0M      0  0:00:04  0:00:01  0:00:03 48.0M
 72  201M   72  146M    0     0  53.9M      0  0:00:03  0:00:02  0:00:01 53.9M
100  201M  100  201M    0     0  56.0M      0  0:00:03  0:00:03 --:--:-- 56.0M
+ echo 'Checking SHA1 on PKG '\''DockerToolbox.pkg'\'''
Checking SHA1 on PKG 'DockerToolbox.pkg'
+ echo '7196d2d30648d486978d29adb5837ff7876517c1 *DockerToolbox.pkg'
+ sha1sum --check DockerToolbox.pkg.sha1
DockerToolbox.pkg: OK
+ rm -f DockerToolbox.pkg.sha1
+ sudo installer -pkg DockerToolbox.pkg -target /
installer: Package name is Docker Toolbox
installer: Installing at base path /
installer: The install was successful.
+ docker --version
Docker version 18.03.0-ce, build 0520e24
+ docker-compose --version
docker-compose version 1.20.1, build 5d8c71b
+ case ${BASH_SOURCE[0]} in
+ SERVER_PATH=/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/shared/testserver
+ case $(sysctl machdep.cpu.features) in
++ sysctl machdep.cpu.features
+ /var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/shared/testserver/docker_testserver.sh VMX
++ command -v realpath
+ '[' -x '' ']'
+ FILE=/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/shared/testserver/docker_testserver.sh
+ case $FILE in
+ SERVER_PATH=/var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/shared/testserver
+ case $1 in
+ source /var/folders/4p/q2h__94n78z4ff9gw2wjgjkr0000gn/T/provisioning-745669689/coin/provisioning/qtci-macos-10.12-x86_64/../common/shared/testserver/docker_machine.sh '-d virtualbox'
++ set -ex
++ TestMachine=qt-test-server
+++ docker-machine ls -q --filter name=qt-test-server
++ '[' -z ']'
++ docker-machine create -d virtualbox qt-test-server
Creating CA: /Users/qt/.docker/machine/certs/ca.pem
Creating client certificate: /Users/qt/.docker/machine/certs/cert.pem
Running pre-create checks...
(qt-test-server) Default Boot2Docker ISO is out-of-date, downloading the latest release...
(qt-test-server) Latest release for github.com/boot2docker/boot2docker is v18.09.2
(qt-test-server) Downloading /Users/qt/.docker/machine/cache/boot2docker.iso from https://github.com/boot2docker/boot2docker/releases/download/v18.09.2/boot2docker.iso...
(qt-test-server) 0%....10%....20%....30%....40%....50%....60%....70%....80%....90%....100%
Creating machine...
(qt-test-server) Copying /Users/qt/.docker/machine/cache/boot2docker.iso to /Users/qt/.docker/machine/machines/qt-test-server/boot2docker.iso...
(qt-test-server) Creating VirtualBox VM...
(qt-test-server) Creating SSH key...
(qt-test-server) Starting the VM...
(qt-test-server) Check network to re-create if needed...
(qt-test-server) Found a new host-only adapter: "vboxnet0"
2019-02-14 11:22:48,117 WARNING: The same agent (1550140263-1, RpcServiceAddress(hostName='10.225.255.196', port=49161)), called agentLaunched twice, that should not happen, forcefully restarting this workitem (provisioning/qtci-macos-10.12-x86_64-9-0da7a7/Provision)