Expected Behavior

According to the documentation pipeline results can contain references to task results. If a task did not run because of it’s whenConditions, the pipeline result is not emitted but the pipeline succeeds. This worked with v0.37.5 of Tekton Pipelines available on OpenShift.

Actual Behavior

With the update of the RedHat OpenShift Pipelines Operator, which brings Tekton Pipeline v0.41.0, pipelines with skipped tasks and composed results now fail with the message invalid pipelineresults [result-goodbye], the referred results don't exist.

Steps to Reproduce the Problem

Run the following PipelineRun:

apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
  name: pipelinerun-test
spec:
  pipelineSpec:
    params:
      - name: say-hello
        default: 'false'
    tasks:
      - name: hello
        taskSpec:
          results:
            - name: result-one
          steps:
          - image: alpine
            script: |
              #!/bin/sh
              echo "Hello world!"
              echo -n "RES1" > $(results.result-one.path)
  
      - name: goodbye
        runAfter:
          - hello
        taskSpec:
          results:
            - name: result-two
          steps:
          - image: alpine
            script: |
              #!/bin/sh
              echo "Goodbye world!"
              echo -n "RES2" > $(results.result-two.path)
        when:
          - input: $(params.say-hello)
            operator: in
            values: ["true"]

    results:
      - name: result-hello
        description: Result one
        value: '$(tasks.hello.results.result-one)'
      - name: result-goodbye
        description: Result two
        value: '$(tasks.goodbye.results.result-two)'

Additional Info

• Kubernetes version:

Server Version: version.Info{Major:"1", Minor:"25", GitVersion:"v1.25.4+a34b9e9", GitCommit:"b6d1f054747e9886f61dd85316deac3415e2726f", GitTreeState:"clean", BuildDate:"2023-01-10T15:55:28Z", GoVersion:"go1.19.4", Compiler:"gc", Platform:"linux/amd64"}

• Tekton Pipeline version:

Pipeline version: v0.41.0
Triggers version: v0.22.0
Openshift Pipelines Version: 1.9.0