Console Output

20:40:11 The recommended git tool is: git
20:40:18 using credential docker-jenkins-github-credentials
20:40:18 Cloning the remote Git repository
20:40:18 Cloning with configured refspecs honoured and without tags
Cloning repository https://github.com/docker/docker-ce-packaging.git
20:40:20 Fetching without tags
20:40:21 Merging remotes/origin/master commit b62b8ab3bf4b0cee52002ca8362ec4afcbfce1ad into PR head commit 77c4f7fde9db270f5fd169e4814d92cb74bdaf12
 > git init /home/ubuntu/workspace/docker-ce-packaging_PR-911 # timeout=10
Fetching upstream changes from https://github.com/docker/docker-ce-packaging.git
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git fetch --no-tags --force --progress -- https://github.com/docker/docker-ce-packaging.git +refs/pull/911/head:refs/remotes/origin/PR-911 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config remote.origin.url https://github.com/docker/docker-ce-packaging.git # timeout=10
 > git config --add remote.origin.fetch +refs/pull/911/head:refs/remotes/origin/PR-911 # timeout=10
 > git config --add remote.origin.fetch +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config remote.origin.url https://github.com/docker/docker-ce-packaging.git # timeout=10
Fetching upstream changes from https://github.com/docker/docker-ce-packaging.git
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git fetch --no-tags --force --progress -- https://github.com/docker/docker-ce-packaging.git +refs/pull/911/head:refs/remotes/origin/PR-911 +refs/heads/master:refs/remotes/origin/master # timeout=10
20:40:21 Merge succeeded, producing 77c4f7fde9db270f5fd169e4814d92cb74bdaf12
20:40:21 Checking out Revision 77c4f7fde9db270f5fd169e4814d92cb74bdaf12 (PR-911)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 77c4f7fde9db270f5fd169e4814d92cb74bdaf12 # timeout=10
 > git remote # timeout=10
 > git config --get remote.origin.url # timeout=10
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git merge b62b8ab3bf4b0cee52002ca8362ec4afcbfce1ad # timeout=10
 > git rev-parse HEAD^{commit} # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 77c4f7fde9db270f5fd169e4814d92cb74bdaf12 # timeout=10
20:40:25 Commit message: "remove Ubuntu 18.04 Bionic Beaver LTS, as it reached end of standard support"
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
fatal: bad object 4f8fd6a86e521290dafaf7c28eced2a9b21b220a