Revert clean-up. definePackage always needs to be called.
diff --git a/java/org/apache/catalina/loader/WebappClassLoaderBase.java b/java/org/apache/catalina/loader/WebappClassLoaderBase.java
index 0cdef0a..bb5ae0b 100644
--- a/java/org/apache/catalina/loader/WebappClassLoaderBase.java
+++ b/java/org/apache/catalina/loader/WebappClassLoaderBase.java
@@ -2451,41 +2451,46 @@
                 }
             }
 
-            if (securityManager != null) {
-                // Looking up the package
-                int pos = name.lastIndexOf('.');
-                if (pos != -1) {
-                    String packageName = name.substring(0, pos);
+            // Looking up the package
+            String packageName = null;
+            int pos = name.lastIndexOf('.');
+            if (pos != -1) {
+                packageName = name.substring(0, pos);
+            }
 
-                    Package pkg = getPackage(packageName);
+            Package pkg = null;
 
-                    // Define the package (if null)
-                    if (pkg == null) {
-                        try {
-                            if (manifest == null) {
-                                definePackage(packageName, null, null, null, null, null, null, null);
-                            } else {
-                                definePackage(packageName, manifest, codeBase);
-                            }
-                        } catch (IllegalArgumentException e) {
-                            // Ignore: normal error due to dual definition of package
-                        }
-                        pkg = getPackage(packageName);
-                    }
+            if (packageName != null) {
+                pkg = getPackage(packageName);
 
-                    // Checking sealing
-                    if (pkg != null) {
-                        boolean sealCheck = true;
-                        if (pkg.isSealed()) {
-                            sealCheck = pkg.isSealed(codeBase);
+                // Define the package (if null)
+                if (pkg == null) {
+                    try {
+                        if (manifest == null) {
+                            definePackage(packageName, null, null, null, null, null, null, null);
                         } else {
-                            sealCheck = (manifest == null) || !isPackageSealed(packageName, manifest);
+                            definePackage(packageName, manifest, codeBase);
                         }
-                        if (!sealCheck) {
-                            throw new SecurityException
-                                ("Sealing violation loading " + name + " : Package "
-                                 + packageName + " is sealed.");
-                        }
+                    } catch (IllegalArgumentException e) {
+                        // Ignore: normal error due to dual definition of package
+                    }
+                    pkg = getPackage(packageName);
+                }
+            }
+
+            if (securityManager != null) {
+                // Checking sealing
+                if (pkg != null) {
+                    boolean sealCheck = true;
+                    if (pkg.isSealed()) {
+                        sealCheck = pkg.isSealed(codeBase);
+                    } else {
+                        sealCheck = (manifest == null) || !isPackageSealed(packageName, manifest);
+                    }
+                    if (!sealCheck) {
+                        throw new SecurityException
+                            ("Sealing violation loading " + name + " : Package "
+                             + packageName + " is sealed.");
                     }
                 }
             }