diff --git a/WHATSNEW b/WHATSNEW
index 30dc39db3..5ecb794d7 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -183,6 +183,10 @@ Fixed bugs:
  * ant -v -version would print the version information twice.
    Bugzilla Report 45695.
 
+ * when nested into builds that have been invoked by <ant> tasks
+   <subant> might set the wrong basedir on the called projects.
+   Bugzilla Report 30569.
+
 Other changes:
 --------------
 
diff --git a/src/main/org/apache/tools/ant/Project.java b/src/main/org/apache/tools/ant/Project.java
index 6c22eda99..307767869 100644
--- a/src/main/org/apache/tools/ant/Project.java
+++ b/src/main/org/apache/tools/ant/Project.java
@@ -655,6 +655,15 @@ public class Project implements ResourceFactory {
         return PropertyHelper.getPropertyHelper(this).getUserProperties();
     }
 
+    /**
+     * Return a copy of the inherited property hashtable.
+     * @return a hashtable containing just the inherited properties.
+     * @since Ant 1.8.0
+     */
+    public Hashtable getInheritedProperties() {
+        return PropertyHelper.getPropertyHelper(this).getInheritedProperties();
+    }
+
     /**
      * Copy all user properties that have been set on the command
      * line or a GUI tool from this instance to the Project instance
diff --git a/src/main/org/apache/tools/ant/PropertyHelper.java b/src/main/org/apache/tools/ant/PropertyHelper.java
index 02a621167..cc87d1df4 100644
--- a/src/main/org/apache/tools/ant/PropertyHelper.java
+++ b/src/main/org/apache/tools/ant/PropertyHelper.java
@@ -774,6 +774,17 @@ public class PropertyHelper implements GetProperty {
         }
     }
 
+    /**
+     * Returns a copy of the inherited property hashtable
+     * @return a hashtable containing just the inherited properties
+     */
+    public Hashtable getInheritedProperties() {
+        //avoid concurrent modification:
+        synchronized (inheritedProperties) {
+            return new Hashtable(inheritedProperties);
+        }
+    }
+
     /**
      * special back door for subclasses, internal access to the hashtables
      * @return the live hashtable of all properties
diff --git a/src/main/org/apache/tools/ant/taskdefs/Ant.java b/src/main/org/apache/tools/ant/taskdefs/Ant.java
index 87bf4da54..6da7eb2bd 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Ant.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Ant.java
@@ -215,7 +215,11 @@ public class Ant extends Task {
             }
         }
         // set user-defined properties
+        if (allowNativeBasedir) {
+            addAlmostAll(getProject().getUserProperties(), PropertyType.USER);
+        } else {
         getProject().copyUserProperties(newProject);
+        }
 
         if (!inheritAll) {
            // set Ant's built-in properties separately,
@@ -224,13 +228,13 @@ public class Ant extends Task {
 
         } else {
             // set all properties from calling project
-            addAlmostAll(getProject().getProperties());
+            addAlmostAll(getProject().getProperties(), PropertyType.PLAIN);
         }
 
         Enumeration e = propertySets.elements();
         while (e.hasMoreElements()) {
             PropertySet ps = (PropertySet) e.nextElement();
-            addAlmostAll(ps.getProperties());
+            addAlmostAll(ps.getProperties(), PropertyType.PLAIN);
         }
     }
 
@@ -490,7 +494,12 @@ public class Ant extends Task {
             p.setProject(newProject);
             p.execute();
         }
+        if (allowNativeBasedir) {
+            addAlmostAll(getProject().getInheritedProperties(),
+                         PropertyType.INHERITED);
+        } else {
         getProject().copyInheritedProperties(newProject);
+        }
     }
 
     /**
@@ -601,23 +610,32 @@ public class Ant extends Task {
      * well as properties named basedir or ant.file.
      * @param props properties <code>Hashtable</code> to copy to the
      * new project.
-     * @since Ant 1.6
+     * @param the type of property to set (a plain Ant property, a
+     * user property or an inherited property).
+     * @since Ant 1.8.0
      */
-    private void addAlmostAll(Hashtable props) {
+    private void addAlmostAll(Hashtable props, PropertyType type) {
         Enumeration e = props.keys();
         while (e.hasMoreElements()) {
             String key = e.nextElement().toString();
-            if (MagicNames.PROJECT_BASEDIR.equals(key) || MagicNames.ANT_FILE.equals(key)) {
+            if (MagicNames.PROJECT_BASEDIR.equals(key)
+                || MagicNames.ANT_FILE.equals(key)) {
                 // basedir and ant.file get special treatment in execute()
                 continue;
             }
 
             String value = props.get(key).toString();
+            if (type == PropertyType.PLAIN) {
             // don't re-set user properties, avoid the warning message
             if (newProject.getProperty(key) == null) {
                 // no user property
                 newProject.setNewProperty(key, value);
             }
+            } else if (type == PropertyType.USER) {
+                newProject.setUserProperty(key, value);
+            } else if (type == PropertyType.INHERITED) {
+                newProject.setInheritedProperty(key, value);
+            }
         }
     }
 
@@ -801,4 +819,11 @@ public class Ant extends Task {
             return name;
         }
     }
+
+    private static final class PropertyType {
+        private PropertyType() {}
+        private static final PropertyType PLAIN = new PropertyType();
+        private static final PropertyType INHERITED = new PropertyType();
+        private static final PropertyType USER = new PropertyType();
+    }
 }
diff --git a/src/tests/antunit/taskdefs/subant-test.xml b/src/tests/antunit/taskdefs/subant-test.xml
index 11f7d9f76..dc8b08663 100644
--- a/src/tests/antunit/taskdefs/subant-test.xml
+++ b/src/tests/antunit/taskdefs/subant-test.xml
@@ -54,7 +54,7 @@
     <ant antfile="${ant.file}" target="testSubAntDoesntSetBasedir"/>
   </target>
 
-  <target name="XtestSubAntDoesntSetBasedirAfterAntWithDir">
+  <target name="testSubAntDoesntSetBasedirAfterAntWithDir">
     <ant antfile="${ant.file}" dir="${basedir}"
          target="testSubAntDoesntSetBasedir"/>
   </target>