pipeline {
    agent any
    stages {

        stage('T1 Triggers Bug') {

            parallel {
                // Removing T1-S1 completely does not trigger bug
                stage('T1-S1') {
                    stages {
                        // Removing T1-S1-Stage1 or T1-S1-Stage2 does not trigger bug
                        stage('T1-S1-Stage1') {
                            steps {
                                script {
                                    println "Did whats-her-name get at ya?"
                                }
                            }
                        }
                        stage('T1-S1-Stage2') {
                            steps {
                                script {
                                    println "Deeeeeeznuuuuts"
                                }
                            }
                        }
                    }
                }

                stage('T1-S2') {
                    stages {
                        // !!!!
                        // Comment out T1-S2-Stage1 or T1-S2-Stage2 to trigger JENKINS-53900
                        // !!!!

                        stage('T1-S2-Stage1') {
                            steps {
                                script {
                                    println "Myello"
                                }
                            }
                        }

                        // stage('T1-S2-Stage2') {
                        //     steps {
                        //         script {
                        //             println "There's the earth-shattering kaboom"
                        //         }
                        //     }
                        // }
                    }
                }

                // Uncommenting T1-S3 will also hide bug

                // stage('T1-S3 (Not nested)') {
                //     steps {
                //         script {
                //             println "This'll fix it"
                //         }
                //     }
                // }
            }
        }

        // This next stage doesn't trigger the bug but it might be displaying wrong.

        // stage('T2 Pointless Wrapper') {
        //     stages {
        //         stage('T2 Nested single Stage') {
        //             steps {
        //                 script {
        //                     println 'Rubber baby buggy bumpers'
        //                 }
        //             }
        //         }
        //     }
        // }

        stage('T3 You Should See This!') {
            steps {
                script {
                    println "You should see this node!"
                }
            }
        }
    }
}