6930032: fix findbugs errors in com.sun.tools.javac.comp

Reviewed-by: darcy

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

@@ -270,6 +270,7 @@ public class Enter extends JCTree.Visitor {
         return ts.toList();
     }
 
+    @Override
     public void visitTopLevel(JCCompilationUnit tree) {
         JavaFileObject prev = log.useSource(tree.sourcefile);
         boolean addEnv = false;
@@ -289,13 +290,13 @@ public class Enter extends JCTree.Visitor {
             tree.packge = syms.unnamedPackage;
         }
         tree.packge.complete(); // Find all classes in package.
-        Env<AttrContext> env = topLevelEnv(tree);
+        Env<AttrContext> topEnv = topLevelEnv(tree);
 
         // Save environment of package-info.java file.
         if (isPkgInfo) {
             Env<AttrContext> env0 = typeEnvs.get(tree.packge);
             if (env0 == null) {
-                typeEnvs.put(tree.packge, env);
+                typeEnvs.put(tree.packge, topEnv);
             } else {
                 JCCompilationUnit tree0 = env0.toplevel;
                 if (!fileManager.isSameFile(tree.sourcefile, tree0.sourcefile)) {
@@ -306,7 +307,7 @@ public class Enter extends JCTree.Visitor {
                     if (addEnv || (tree0.packageAnnotations.isEmpty() &&
                                    tree.docComments != null &&
                                    tree.docComments.get(tree) != null)) {
-                        typeEnvs.put(tree.packge, env);
+                        typeEnvs.put(tree.packge, topEnv);
                     }
                 }
             }
@@ -322,14 +323,15 @@ public class Enter extends JCTree.Visitor {
             c.members_field = new Scope(c);
             tree.packge.package_info = c;
         }
-        classEnter(tree.defs, env);
+        classEnter(tree.defs, topEnv);
         if (addEnv) {
-            todo.append(env);
+            todo.append(topEnv);
         }
         log.useSource(prev);
         result = null;
     }
 
+    @Override
     public void visitClassDef(JCClassDecl tree) {
         Symbol owner = env.info.scope.owner;
         Scope enclScope = enterScope(env);
@@ -435,6 +437,7 @@ public class Enter extends JCTree.Visitor {
      *  Enter a symbol for type parameter in local scope, after checking that it
      *  is unique.
      */
+    @Override
     public void visitTypeParameter(JCTypeParameter tree) {
         TypeVar a = (tree.type != null)
             ? (TypeVar)tree.type
@@ -448,6 +451,7 @@ public class Enter extends JCTree.Visitor {
 
     /** Default class enter visitor method: do nothing.
      */
+    @Override
     public void visitTree(JCTree tree) {
         result = null;
     }
@@ -489,10 +493,8 @@ public class Enter extends JCTree.Visitor {
                 for (JCCompilationUnit tree : trees) {
                     if (tree.starImportScope.elems == null) {
                         JavaFileObject prev = log.useSource(tree.sourcefile);
-                        Env<AttrContext> env = typeEnvs.get(tree);
-                        if (env == null)
-                            env = topLevelEnv(tree);
-                        memberEnter.memberEnter(tree, env);
+                        Env<AttrContext> topEnv = topLevelEnv(tree);
+                        memberEnter.memberEnter(tree, topEnv);
                         log.useSource(prev);
                     }
                 }

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

@@ -607,10 +607,12 @@ public class TransTypes extends TreeTranslator {
     public void visitNewArray(JCNewArray tree) {
         tree.elemtype = translate(tree.elemtype, null);
         translate(tree.dims, syms.intType);
-        tree.elems = translate(tree.elems,
-                               (tree.type == null) ? null
-                               : erasure(types.elemtype(tree.type)));
-        tree.type = erasure(tree.type);
+        if (tree.type != null) {
+            tree.elems = translate(tree.elems, erasure(types.elemtype(tree.type)));
+            tree.type = erasure(tree.type);
+        } else {
+            tree.elems = translate(tree.elems, null);
+        }
 
         result = tree;
     }