[JENKINS-73726] Reproduced error in test

pipeline-model-definition/src/test/java/org/jenkinsci/plugins/pipeline/modeldefinition/ParallelTest.java

@@ -444,4 +444,13 @@ public void parallelInput() throws Exception {
         j.assertLogContains("Two Continues", b);
     }
 
+    @Issue("JENKINS-73726")
+    @Test
+    public void parallelErrorPost() throws Exception {
+        expect(Result.FAILURE, "parallel/parallelErrorPost")
+            .logContains("the final failure block")
+            .hasFailureCase()
+            .go();
+    }
+
 }

pipeline-model-definition/src/test/resources/parallel/parallelErrorPost.groovy

@@ -0,0 +1,33 @@
+pipeline {
+    options {
+        parallelsAlwaysFailFast()
+        skipDefaultCheckout()
+    }
+    agent none
+    stages {
+        stage('fails') {
+            steps {
+                error 'some problem'
+            }
+        }
+        stage('parallels') {
+            parallel {
+                stage('branch-1') {
+                    steps {
+                        echo 'branch 1'
+                    }
+                }
+                stage('branch-2') {
+                    steps {
+                        echo 'branch 2'
+                    }
+                }
+            }
+        }
+    }
+    post {
+        failure {
+            echo 'the final failure block'
+        }
+    }
+}