I'm using this Pipeline code snippet to check out code. I want the job to run 'p4 sync -k' so it populates a have list, but don't actually sync files (just like https://issues.jenkins-ci.org/browse/JENKINS-24490)

 
checkout perforce(
    credential: 'p4_server',
    populate: previewOnly(quiet: true),
    workspace: streamSpec(
        charset: 'none',
        format: 'jenkins-${NODE_NAME}-${JOB_NAME}',
        pinHost: false,
        streamName: '//depot/stream'
    )
)
 
When I look at the build log, the p4 plugin is running "p4 sync -n", not "p4 sync -k". Both the documentation and several JIRA issues all state that this option should use -k, but it doesn't seem to be.
 
---------------------------------------------------
 
[Pipeline] checkout*15:46:08*
... p4 client -o jenkins-job-client +
 
15:46:08
... p4 info +
 
15:46:08
... p4 client -o jenkins-job-client +
 
15:46:08
... p4 client -i +
 
15:46:08
... p4 client -o jenkins-job-client +
 
15:46:08
... p4 client -i +
 
15:46:08 ... client: jenkins-job-client*15:46:08*
... p4 client -o jenkins-job-client +
 
15:46:08
... p4 info +
 
15:46:08
... p4 counter change +
 
15:46:08
... p4 changes -m1 -ssubmitted //jenkins-job-client/..___ +
 
15:46:08
... p4 repos -C +
 
15:46:14 Building on Node: NODE_NAME*15:46:14*
... p4 client -o jenkins-job-client +
 
15:46:14
... p4 info +
 
15:46:14 15:46:14 P4 Task: establishing connection.15:46:14 ... server: p4-server:1666*15:46:14* ... node: NODE_NAME*15:46:14* 15:46:14 P4 Task: syncing files at change: 547297*15:46:14*
... p4 sync -n -q D:\workspace\jayspang-test-trigger/...@547297 +
 
15:46:15 duration: 0m 1s*15:46:15* 15:46:15 P4 Task: saving built changes.15:46:15 Found last change 547036 on syncID jenkins-NODE_NAME-jayspang-test-trigger*15:46:15*
... p4 client -o jenkins-job-client +
 
15:46:15
... p4 info +
 
15:46:15
... p4 changes -m20 //jenkins-job-client/...@547036,54___ +
 
15:46:15
... p4 changes -l -m1 @547297 +
 
15:46:15
... p4 user -o username +
 
15:46:15
... p4 describe -s -m51 547297 +
 
15:46:15
... p4 fixes -c547297 +
 
15:46:15 ... done