Fix issues with earlier fix for #1855

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java

@@ -71,6 +71,7 @@ public void validateSubType(DeserializationContext ctxt, JavaType type) throws J
         final Class<?> raw = type.getRawClass();
         String full = raw.getName();
 
+        main_check:
         do {
             if (_cfgIllegalClassNames.contains(full)) {
                 break;
@@ -84,8 +85,8 @@ public void validateSubType(DeserializationContext ctxt, JavaType type) throws J
                     // looking for "AbstractBeanFactoryPointcutAdvisor" but no point to allow any is there?
                     if ("AbstractPointcutAdvisor".equals(name)
                             // ditto  for "FileSystemXmlApplicationContext": block all ApplicationContexts
-                            || "AbstractApplicationContext.equals".equals(name)) {
-                        break;
+                            || "AbstractApplicationContext".equals(name)) {
+                        break main_check;
                     }
                 }
             }

src/test/java/com/fasterxml/jackson/databind/interop/IllegalTypesCheckTest.java

@@ -1,5 +1,8 @@
 package com.fasterxml.jackson.databind.interop;
 
+import org.springframework.jacksontest.BogusApplicationContext;
+import org.springframework.jacksontest.BogusPointcutAdvisor;
+
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.databind.*;
 
@@ -67,6 +70,10 @@ public void testJDKTypes1855() throws Exception
     {
         // apparently included by JDK?
         _testIllegalType("com.sun.org.apache.bcel.internal.util.ClassLoader");
+
+        // also: we can try some form of testing, even if bit contrived...
+        _testIllegalType(BogusPointcutAdvisor.class);
+        _testIllegalType(BogusApplicationContext.class);
     }
 
     // 17-Aug-2017, tatu: Ideally would test handling of 3rd party types, too,

src/test/java/org/springframework/jacksontest/AbstractApplicationContext.java

@@ -0,0 +1,5 @@
+package org.springframework.jacksontest;
+
+public class AbstractApplicationContext {
+
+}

src/test/java/org/springframework/jacksontest/AbstractPointcutAdvisor.java

@@ -0,0 +1,5 @@
+package org.springframework.jacksontest;
+
+public class AbstractPointcutAdvisor {
+
+}

src/test/java/org/springframework/jacksontest/BogusApplicationContext.java

@@ -0,0 +1,9 @@
+package org.springframework.jacksontest;
+
+//Made-up test class that should trigger checks for [databind#1855]
+public class BogusApplicationContext extends AbstractApplicationContext {
+    public BogusApplicationContext(String s) {
+        super();
+        throw new Error("Wrong!");
+    }
+}

src/test/java/org/springframework/jacksontest/BogusPointcutAdvisor.java

@@ -0,0 +1,9 @@
+package org.springframework.jacksontest;
+
+// Made-up test class that should trigger checks for [databind#1855]
+public class BogusPointcutAdvisor extends AbstractPointcutAdvisor {
+    public BogusPointcutAdvisor(String s) {
+        super();
+        throw new Error("Wrong!");
+    }
+}