Fixes #2721, super outside of classes with extends for instance methods.

lib/coffee-script/nodes.js

@@ -812,8 +812,10 @@
         }
         accesses.push(new Access(new Literal(name)));
         return (new Value(new Literal(method.klass), accesses)).compile(o);
-      } else {
+      } else if (method.ctor) {
         return "" + name + ".__super__.constructor";
+      } else {
+        return "this.constructor.__super__." + name;
       }
     };
 

src/nodes.coffee

@@ -523,8 +523,10 @@ exports.Call = class Call extends Base
       accesses.push new Access new Literal 'constructor' if method.static
       accesses.push new Access new Literal name
       (new Value (new Literal method.klass), accesses).compile o
-    else
+    else if method.ctor
       "#{name}.__super__.constructor"
+    else
+      "this.constructor.__super__.#{name}"
 
   # The appropriate `this` value for a `super` call.
   superThis : (o) ->

test/classes.coffee

@@ -117,24 +117,23 @@ test "basic classes, again, but in the manual prototype style", ->
   ok (new ThirdChild)['func-func']('thing') is 'dynamic-thing'
 
 
-test "super with plain ol' functions as the original constructors", ->
+test "super with plain ol' prototypes", ->
 
-  TopClass = (arg) ->
-    @prop = 'top-' + arg
-    this
+  TopClass = ->
+  TopClass::func = (arg) ->
+    'top-' + arg
 
-  SuperClass = (arg) ->
+  SuperClass = ->
+  SuperClass extends TopClass
+  SuperClass::func = (arg) ->
     super 'super-' + arg
-    this
 
   SubClass = ->
-    super 'sub'
-    this
-
-  SuperClass extends TopClass
   SubClass extends SuperClass
+  SubClass::func = ->
+    super 'sub'
 
-  ok (new SubClass).prop is 'top-super-sub'
+  eq (new SubClass).func(), 'top-super-sub'
 
 
 test "'@' referring to the current instance, and not being coerced into a call", ->
@@ -717,4 +716,4 @@ test "#2359: extending native objects that use other typed constructors requires
 
   workingArray = new WorkingArray
   ok workingArray instanceof WorkingArray
-  eq 'yes!', workingArray.method()
+  eq 'yes!', workingArray.method()