为什么Jenkins不运行这个循环的内容?

所以我有一个 Jenkinsfile 这样地:

properties([
  [$class:   'BuildDiscarderProperty',
   strategy: [$class:               'LogRotator',
              numToKeepStr:         '10',
              artifactNumToKeepStr: '15']]
])

List<String> buildFlavours = ['ubuntu', 'macosx']
List<BuildStep> modulesGroups = [
  new BuildStep('UnitTestGroup1'),
  new BuildStep('UnitTestGroup2')
]

println "*** outside loop, buildFlavours.size() = ${buildFlavours.size()}"
buildFlavours.each { flavour ->
  println "*** inside loop, flavour = ${flavour}"
  println "*** outside loop, modulesGroups.size() = ${modulesGroups.size()}"
  modulesGroups.each { group ->

    // Doesn't work, silently terminates the pipeline with no error!
    println "*** inside loop, group = ${group}"

    // Somehow this works:
    // String groupCopy = group.toString()
    // println "*** inside loop, group = ${groupCopy}"
  }
}

class BuildStep {
  private String displayName

  BuildStep(String displayName) {
    this.displayName = displayName
  }

  @Override
  String toString() {
    return displayName
  }
}

当我运行它时,我得到以下输出:

[Pipeline] properties
[Pipeline] echo
*** outside loop, buildFlavours.size() = 2
[Pipeline] echo
*** inside loop, flavour = ubuntu
[Pipeline] echo
*** outside loop, modulesGroups.size() = 2
[Pipeline] echo
*** inside loop, flavour = macosx
[Pipeline] echo
*** outside loop, modulesGroups.size() = 2
[Pipeline] End of Pipeline

为什么循环的内容似乎没有被执行,既没有打印消息也没有抛出错误?

我得到的最好的线索是Jenkins正在使用Groovy CPS,也许出于某种原因,它可能会把代码重写得一团糟。

到目前为止的调查:

1. 它不会扔任何东西 Throwable -如果我试图抓住一个,什么也抓不到。
2. 当我把循环中的println改为 toString() 首先,不知何故 做 工作和循环内部的信息确实会被打印出来,但我还不知道为什么。
3. 制造 BuildStep 类序列化或更改其名称不会影响任何事情。
4. 现在, filed a ticket 因为至少我认为糟糕的错误报告是可以修复的。