Stashing doesn't work in containers and there's no way to debug it

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      I'm trying to use declarative pipeline with Kubernetes plugin version 1.30.1. I've confirmed that the files I want to stash exist in $WORKSPACE directory, yet stash fails with

      hudson.AbortException: No files included in stash ‘dist-pypi-3.7’
      	at org.jenkinsci.plugins.workflow.flow.StashManager.stash(StashManager.java:128)
      	at org.jenkinsci.plugins.workflow.support.steps.stash.StashStep$Execution.run(StashStep.java:115)
      	at org.jenkinsci.plugins.workflow.support.steps.stash.StashStep$Execution.run(StashStep.java:103)
      	at org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:47)
      	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      	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)
      

      This message is obviously worthless, since it doesn't tell where stash was hoping to find the files, so there's no way to fix the error.

      The code causing the error looks more or less like this:

      {
          podTemplate(containers: [
              containerTemplate(
                  name: 'python',
                  image: "python:${PYTHON_VERSION}",
                  command: 'sleep',
                  args: '99d'
              )
          ]) {
              node(POD_LABEL) {
                  git url: 'https://github.com/wvxvw/*****.git', branch: 'main'
                  container('python') {
                      sh "python${PYTHON_VERSION} -m venv .venv"
                      sh './.venv/bin/python -m pip install wheel'
                      sh './.venv/bin/python ./setup.py bdist_egg'
                      sh 'ls ./dist/'
                      sh "ls ${WORKSPACE}"
                      sh 'pwd'
                      sh 'env'
                      stash includes: './dist/*.*',
                          name: "dist-pypi-${PYTHON_VERSION}"
                  }
              }
          }
      }
      

            Assignee:
            Unassigned
            Reporter:
            Whatever
            Archiver:
            Jenkins Service Account

              Created:
              Updated:
              Archived: