minor

lib/compress.js

@@ -768,21 +768,34 @@ function Compressor(options, false_by_default) {
     /* -----[ node squeezers ]----- */
 
     SQUEEZE(AST_Directive, function(self, compressor){
-        if (self.hoisted || self.scope.has_directive(self.value) !== self.scope) {
+        return self.optimize(compressor);
-            return new AST_EmptyStatement(self);
+    });
+
+    AST_Directive.DEFMETHOD("optimize", function(compressor){
+        if (this.hoisted || this.scope.has_directive(this.value) !== this.scope) {
+            return make_node(AST_EmptyStatement, this);
         }
-        return self;
+        return this;
     });
 
     SQUEEZE(AST_Debugger, function(self, compressor){
+        return self.optimize(compressor);
+    });
+
+    AST_Debugger.DEFMETHOD("optimize", function(compressor){
         if (compressor.option("drop_debugger"))
-            return new AST_EmptyStatement(self);
+            return make_node(AST_EmptyStatement, this);
+        return this;
     });
 
     SQUEEZE(AST_LabeledStatement, function(self, compressor){
         self = self.clone();
         self.body = self.body.squeeze(compressor);
-        return self.label.references.length == 0 ? self.body : self;
+        return self.optimize(compressor);
+    });
+
+    AST_LabeledStatement.DEFMETHOD("optimize", function(){
+        return this.label.references.length == 0 ? this.body : this;
     });
 
     SQUEEZE(AST_Statement, function(self, compressor){