--- old/src/share/classes/com/sun/tools/javac/comp/Attr.java	2010-07-01 12:35:19.000000000 -0700
+++ new/src/share/classes/com/sun/tools/javac/comp/Attr.java	2010-07-01 12:35:19.000000000 -0700
@@ -197,7 +197,7 @@
     Type check(JCTree tree, Type owntype, int ownkind, int pkind, Type pt) {
         if (owntype.tag != ERROR && pt.tag != METHOD && pt.tag != FORALL) {
             if ((ownkind & ~pkind) == 0) {
-                owntype = chk.checkType(tree.pos(), owntype, pt);
+                owntype = chk.checkType(tree.pos(), owntype, pt, errKey);
             } else {
                 log.error(tree.pos(), "unexpected.type",
                           kindNames(pkind),
@@ -244,7 +244,11 @@
              !((base == null ||
                (base.getTag() == JCTree.IDENT && TreeInfo.name(base) == names._this)) &&
                isAssignableAsBlankFinal(v, env)))) {
-            log.error(pos, "cant.assign.val.to.final.var", v);
+            if (types.asSuper(v.type, syms.autoCloseableType.tsym) != null) { //ARM resource
+                log.error(pos, "arm.resource.may.not.be.assigned", v);
+            } else {
+                log.error(pos, "cant.assign.val.to.final.var", v);
+            }
         }
     }
 
@@ -377,6 +381,10 @@
      */
     Type pt;
 
+    /** Visitor argument: the error key to be generated when a type error occurs
+     */
+    String errKey;
+
     /** Visitor result: the computed type.
      */
     Type result;
@@ -390,13 +398,19 @@
      *  @param pt      The prototype visitor argument.
      */
     Type attribTree(JCTree tree, Env<AttrContext> env, int pkind, Type pt) {
+        return attribTree(tree, env, pkind, pt, "incompatible.types");
+    }
+
+    Type attribTree(JCTree tree, Env<AttrContext> env, int pkind, Type pt, String errKey) {
         Env<AttrContext> prevEnv = this.env;
         int prevPkind = this.pkind;
         Type prevPt = this.pt;
+        String prevErrKey = this.errKey;
         try {
             this.env = env;
             this.pkind = pkind;
             this.pt = pt;
+            this.errKey = errKey;
             tree.accept(this);
             if (tree == breakTree)
                 throw new BreakAttr(env);
@@ -408,6 +422,7 @@
             this.env = prevEnv;
             this.pkind = prevPkind;
             this.pt = prevPt;
+            this.errKey = prevErrKey;
         }
     }
 
@@ -417,6 +432,10 @@
         return attribTree(tree, env, VAL, pt.tag != ERROR ? pt : Type.noType);
     }
 
+    public Type attribExpr(JCTree tree, Env<AttrContext> env, Type pt, String key) {
+        return attribTree(tree, env, VAL, pt.tag != ERROR ? pt : Type.noType, key);
+    }
+
     /** Derived visitor method: attribute an expression tree with
      *  no constraints on the computed type.
      */
@@ -981,14 +1000,35 @@
     }
 
     public void visitTry(JCTry tree) {
+        // Create a new local environment with a local scope.
+        Env<AttrContext> localEnv = env.dup(tree, env.info.dup(env.info.scope.dup()));
+        // Attribute resource declarations
+        ListBuffer<VarSymbol> resourceVars = ListBuffer.lb();
+        for (JCTree resource : tree.resources) {
+            if (resource.getTag() == JCTree.VARDEF) {
+                attribStat(resource, localEnv);
+                chk.checkType(resource, resource.type, syms.autoCloseableType, "arm.not.applicable.to.type");
+                VarSymbol var = (VarSymbol)TreeInfo.symbolFor(resource);
+                var.setData(ElementKind.RESOURCE_VARIABLE);
+                resourceVars.append(var);
+            } else {
+                attribExpr(resource, localEnv, syms.autoCloseableType, "arm.not.applicable.to.type");
+            }
+        }
         // Attribute body
-        attribStat(tree.body, env.dup(tree, env.info.dup()));
+        attribStat(tree.body, localEnv.dup(tree, localEnv.info.dup()));
+
+        //remove arm resource vars from local scope - such variables cannot be
+        //accessed from catch/finally clauses
+        for (VarSymbol resourceVar : resourceVars) {
+            localEnv.info.scope.remove(resourceVar);
+        }
 
         // Attribute catch clauses
         for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
             JCCatch c = l.head;
             Env<AttrContext> catchEnv =
-                env.dup(c, env.info.dup(env.info.scope.dup()));
+                localEnv.dup(c, localEnv.info.dup(localEnv.info.scope.dup()));
             Type ctype = attribStat(c.param, catchEnv);
             if (TreeInfo.isMultiCatch(c)) {
                 //check that multi-catch parameter is marked as final
@@ -1008,7 +1048,9 @@
         }
 
         // Attribute finalizer
-        if (tree.finalizer != null) attribStat(tree.finalizer, env);
+        if (tree.finalizer != null) attribStat(tree.finalizer, localEnv);
+
+        localEnv.info.scope.leave();
         result = null;
     }