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

@@ -242,13 +242,17 @@
             ((v.flags() & HASINIT) != 0
              ||
              !((base == null ||
                (base.getTag() == JCTree.IDENT && TreeInfo.name(base) == names._this)) &&
                isAssignableAsBlankFinal(v, env)))) {
+            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);
         }
     }
+    }
 
     /** Does tree represent a static reference to an identifier?
      *  It is assumed that tree is either a SELECT or an IDENT.
      *  We have to weed out selects from non-type names here.
      *  @param tree    The candidate tree.

@@ -979,18 +983,37 @@
         attribStat(tree.body, env);
         result = null;
     }
 
     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) {
+            attribExpr(resource, localEnv);
+            chk.checkArmResource(resource);
+            if (resource.getTag() == JCTree.VARDEF) {
+                VarSymbol var = (VarSymbol)TreeInfo.symbolFor(resource);
+                var.setData(ElementKind.RESOURCE_VARIABLE);
+                resourceVars.append(var);
+            }
+        }
         // 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
                 if ((c.param.sym.flags() & FINAL) == 0) {
                     log.error(c.param.pos(), "multicatch.param.must.be.final", c.param.sym);

@@ -1006,11 +1029,13 @@
             attribStat(c.body, catchEnv);
             catchEnv.info.scope.leave();
         }
 
         // Attribute finalizer
-        if (tree.finalizer != null) attribStat(tree.finalizer, env);
+        if (tree.finalizer != null) attribStat(tree.finalizer, localEnv);
+
+        localEnv.info.scope.leave();
         result = null;
     }
 
     public void visitConditional(JCConditional tree) {
         attribExpr(tree.cond, env, syms.booleanType);