fixing calling super from constructors

lib/coffee_script/nodes.rb

@@ -243,7 +243,9 @@ module CoffeeScript
     def compile_super(args, o)
       methname = o[:last_assign]
       arg_part = args.empty? ? '' : ", #{args}"
-      "#{o[:proto_assign]}.__superClass__.#{methname}.call(this#{arg_part})"
+      meth     = o[:proto_assign] ? "#{o[:proto_assign]}.__superClass__.#{methname}" :
+                                    "#{methname}.__superClass__.constructor"
+      "#{meth}.call(this#{arg_part})"
     end
 
     def compile_splat(o)

test/fixtures/execution/test_calling_super.coffee

@@ -22,3 +22,17 @@ result: (new ThirdChild()).func('four')
 
 print(result is 'zero/one/two/three/four')
 
+
+TopClass: arg =>
+  this.prop: 'top-' + arg
+
+SuperClass: arg =>
+  super('super-' + arg)
+
+SubClass: =>
+  super('sub')
+
+SuperClass extends TopClass
+SubClass extends SuperClass
+
+print((new SubClass()).prop is 'top-super-sub')