fix break in r3504

frog/minfrog

 #!/usr/bin/env node
 //  ********** Library dart:core **************
 //  ********** Natives dart:core **************
 function $throw(e) {
   // If e is not a value, we can use V8's captureStackTrace utility method.
   // TODO(jmesserly): capture the stack trace on other JS engines.
   if (e && (typeof e == 'object') && Error.captureStackTrace) {
     // TODO(jmesserly): this will clobber the e.stack property
     Error.captureStackTrace(e, $throw);
   }
@@ skipping 12443 matching lines @@
   Value.call(this, type, null, span);
 }
 PureStaticValue.prototype.get$isConst = function() { return this.isConst; };
 PureStaticValue.prototype.set$isConst = function(value) { return this.isConst = value; };
 PureStaticValue.prototype.get$isType = function() { return this.isType; };
 PureStaticValue.prototype.set$isType = function(value) { return this.isType = value; };
 PureStaticValue.prototype.getMem = function(context, name, node) {
   var member = this.get$type().getMember(name);
   if ($eq(member)) {
     $globals.world.warning(("can not find \"" + name + "\" on \"" + this.get$type().name + "\""), node.span);
+    return null;
   }
   if (this.isType && !member.get$isStatic()) {
     $globals.world.error("can not refer to instance member as static", node.span);
   }
   return member;
 }
 PureStaticValue.prototype.get_ = function(context, name, node) {
   if (this.get$type().get$isVar()) return new PureStaticValue($globals.world.varType, node.span, false, false);
   var member = this.getMem(context, name, node);
   if ($eq(member)) return new PureStaticValue($globals.world.varType, node.span, false, false);
@@ skipping 1815 matching lines @@
   $globals._RED_COLOR = "\x1b[31m";
 }
 var const$0000 = Object.create(_DeletedKeySentinel.prototype, {});
 var const$0001 = Object.create(NoMoreElementsException.prototype, {});
 var const$0002 = Object.create(EmptyQueueException.prototype, {});
 var const$0006 = Object.create(IllegalAccessException.prototype, {});
 var const$0007 = ImmutableList.ImmutableList$from$factory([]);
 var $globals = {};
 $static_init();
 main();