Fixes #3232 -- Tag all class properties static

Author: Marc Häfner

lib/coffee-script/nodes.js

@@ -1005,6 +1005,10 @@ exports.Class = class Class extends Base
       else if node instanceof Code
         node.klass    = name
         node.context  = name if node.bound
+      else if node instanceof Assign and
+              node.variable.base.value in ['this', name] and
+              node.variable.properties[0]?.name?.value isnt 'prototype'
+        node.value.static = yes
 
   # Ensure that all functions bound to the instance are proxied in the
   # constructor.

src/nodes.coffee

@@ -816,3 +816,12 @@ test "#2949: super in static method with reserved name", ->
     @static: -> super
 
   eq Bar.static(), 'baz'
+
+test "#3232: super in static methods (not object-assigned)", ->
+  class Foo
+    @fn = -> true
+
+  class Bar extends Foo
+    @fn = -> super
+
+  ok Bar.fn()