[FIXED JENKINS-23375] Incorrect redirect after deleting a folder.

changelog.html

@@ -61,6 +61,9 @@ Upcoming changes</a>
   <li class=rfe>
     Support the range notation for pagination in API
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-23228">issue 23228</a>)
+  <li class=bug>
+    Incorrect redirect after deleting a folder.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-23375">issue 23375</a>)
   <li class=rfe>
     API changes allowing new job types to use SCM plugins.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-23365">issue 23365</a>)

core/src/main/java/hudson/model/AbstractItem.java

@@ -501,7 +501,7 @@ public abstract class AbstractItem extends Actionable implements Item, HttpDelet
             if (a instanceof View) {
                 url = ((View) a).getUrl();
                 break;
-            } else if (a instanceof ViewGroup) {
+            } else if (a instanceof ViewGroup && a != this) {
                 url = ((ViewGroup) a).getUrl();
                 break;
             }

test/src/test/groovy/hudson/model/AbstractProjectTest.groovy

@@ -381,6 +381,7 @@ public class AbstractProjectTest extends HudsonTestCase {
         assert "job/d/" == deleteRedirectTarget("job/d/job/j3");
         assert "job/d/view/v2/" == deleteRedirectTarget("job/d/view/v2/job/j4");
         assert "view/v1/job/d/" == deleteRedirectTarget("view/v1/job/d/job/j5");
+        assert "view/v1/" == deleteRedirectTarget("view/v1/job/d"); // JENKINS-23375
     }
 
     private String deleteRedirectTarget(String job) {