Started by upstream project "bcc-pr" build number 1224
originally caused by:
 GitHub pull request #3704 of commit 81e21a93d42df6294e7f03367b16885c543cd961, no merge conflicts.
Running as SYSTEM
Building remotely on fedora27-slave-152 (fc27) in workspace /home/fedora/jenkins/workspace/bcc-pr/label/fc27
The recommended git tool is: NONE
No credentials specified
Cloning the remote Git repository
Cloning repository https://github.com/iovisor/bcc.git
 > git init /home/fedora/jenkins/workspace/bcc-pr/label/fc27 # timeout=10
Fetching upstream changes from https://github.com/iovisor/bcc.git
 > git --version # timeout=10
 > git --version # 'git version 2.14.3'
 > git fetch --tags --progress -- https://github.com/iovisor/bcc.git +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://github.com/iovisor/bcc.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://github.com/iovisor/bcc.git # timeout=10
Fetching upstream changes from https://github.com/iovisor/bcc.git
 > git fetch --tags --progress -- https://github.com/iovisor/bcc.git +refs/pull/*:refs/remotes/origin/pr/* # timeout=10
JENKINS-19022: warning: possible memory leak due to Git plugin usage; see: https://plugins.jenkins.io/git/#remove-git-plugin-buildsbybranch-builddata-script
Checking out Revision 7ff6934d3a24068da35a135ae2fc4521c9785dcb (refs/remotes/origin/pr/3704/merge)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 7ff6934d3a24068da35a135ae2fc4521c9785dcb # timeout=10
FATAL: Could not checkout 7ff6934d3a24068da35a135ae2fc4521c9785dcb
hudson.plugins.git.GitException: Command "git checkout -f 7ff6934d3a24068da35a135ae2fc4521c9785dcb" returned status code 128:
stdout: 
stderr: fatal: reference is not a tree: 7ff6934d3a24068da35a135ae2fc4521c9785dcb

	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2681)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$1100(CliGitAPIImpl.java:86)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$9.execute(CliGitAPIImpl.java:2999)
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to fedora27-slave-152
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1797)
		at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
		at hudson.remoting.Channel.call(Channel.java:1001)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)
		at sun.reflect.GeneratedMethodAccessor886.invoke(Unknown Source)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)
		at com.sun.proxy.$Proxy183.execute(Unknown Source)
		at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1352)
		at hudson.scm.SCM.checkout(SCM.java:505)
		at hudson.model.AbstractProject.checkout(AbstractProject.java:1213)
		at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:637)
		at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:85)
		at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:509)
		at hudson.model.Run.execute(Run.java:1888)
		at hudson.matrix.MatrixRun.run(MatrixRun.java:153)
		at hudson.model.ResourceController.execute(ResourceController.java:99)
		at hudson.model.Executor.run(Executor.java:431)
Caused: hudson.plugins.git.GitException: Could not checkout 7ff6934d3a24068da35a135ae2fc4521c9785dcb
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$9.execute(CliGitAPIImpl.java:3023)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:160)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:153)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:376)
	at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE