6614974: javac successfully compiles code that throws java.lang.VerifyError when run

Summary: synthetic cast missing when translating autoboxing expressions
Reviewed-by: jjg

src/share/classes/com/sun/tools/javac/comp/Lower.java

@@ -1835,6 +1835,7 @@ public class Lower extends TreeTranslator {
                                           + "" + rval.hashCode()),
                                       type,
                                       currentMethodSym);
+        rval = convert(rval,type);
         JCVariableDecl def = make.VarDef(var, (JCExpression)rval); // XXX cast
         JCTree built = builder.build(make.Ident(var));
         JCTree res = make.LetExpr(def, built);

test/tools/javac/boxing/T6614974.java

+/*
+ * Copyright 2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug     6614974
+ * @summary javac successfully compiles code that throws java.lang.VerifyError when run
+ * @author  mcimadamore
+ */
+public class T6614974<T> {
+
+    private T n;
+
+    public void error() {
+        T6614974<Integer> val = new T6614974<Integer>();
+        val.n = 0;
+        Integer.toString(val.n++);
+    }
+
+    public static void main(String[] args) {
+        T6614974.class.getMethods();
+    }
+}