--- a/src/share/classes/com/sun/tools/javac/api/BasicJavacTask.java	Fri Sep 14 13:22:59 2012 -0700
+++ b/src/share/classes/com/sun/tools/javac/api/BasicJavacTask.java	Mon Sep 24 14:04:34 2012 -0700
@@ -136,4 +136,11 @@
         throw new IllegalStateException();
     }
 
+    /**
+     * For internal use only.  This method will be
+     * removed without warning.
+     */
+    public void updateContext(Context newContext) {
+        context = newContext;
+    }
 }

--- a/src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Fri Sep 14 13:22:59 2012 -0700
+++ b/src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Mon Sep 24 14:04:34 2012 -0700
@@ -49,7 +49,7 @@
 
 import com.sun.source.util.JavacTask;
 import com.sun.source.util.TaskEvent;
-import com.sun.tools.javac.api.JavacTaskImpl;
+import com.sun.tools.javac.api.BasicJavacTask;
 import com.sun.tools.javac.api.JavacTrees;
 import com.sun.tools.javac.api.MultiTaskListener;
 import com.sun.tools.javac.code.*;
@@ -1086,10 +1086,11 @@
             elementUtils.setContext(next);
             typeUtils.setContext(next);
 
-            JavacTaskImpl task = (JavacTaskImpl) context.get(JavacTask.class);
+            JavacTask task = context.get(JavacTask.class);
             if (task != null) {
                 next.put(JavacTask.class, task);
-                task.updateContext(next);
+                if (task instanceof BasicJavacTask)
+                    ((BasicJavacTask) task).updateContext(next);
             }
 
             JavacTrees trees = context.get(JavacTrees.class);

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/processing/T7196462.java	Mon Sep 24 14:04:34 2012 -0700
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 7196462
+ * @summary JavacProcessingEnvironment should tolerate BasicJavacTask
+ * @library ../lib
+ * @build JavacTestingAbstractProcessor T7196462
+ * @compile/process -processor T7196462 T7196462.java
+ */
+
+import java.util.*;
+import javax.annotation.processing.*;
+import javax.lang.model.element.*;
+import com.sun.source.util.*;
+
+public class T7196462 extends JavacTestingAbstractProcessor {
+    public boolean process(Set<? extends TypeElement> annos,RoundEnvironment rEnv) {
+        JavacTask t = JavacTask.instance(processingEnv);
+        System.err.println(t);
+        return true;
+    }
+}