fixed issue with nested properties

src/nodes.coffee

@@ -2233,7 +2233,7 @@ exports.Assign = class Assign extends Base
               nestedSource = new Value source.base, source.properties.concat [new Access getPropKey prop]
               nestedSource = new Value new Op '?', nestedSource, nestedSourceDefault if nestedSourceDefault
             else
-              nestedSource = source
+              nestedSource = new Value source, [new Access getPropKey prop]
             restElements.push traverseRest(nestedProperties, nestedSource)...
         else if prop instanceof Splat
           prop.error "multiple rest elements are disallowed in object destructuring" if restIndex?
@@ -2251,15 +2251,7 @@ exports.Assign = class Assign extends Base
       restElements
 
     # Cache the value for reuse with rest elements.
-    # `Obj` should be always cached.
-    # Examples:
-    #   {a, r...} = {a:1, b:2, c:3}
-    #   {a, r...} = {a:1, obj...}
-    shouldCache = (value) ->
-      return yes if value.base instanceof Obj
-      value.shouldCache()
-
-    [@value, valueRef] = @value.cache o, false, shouldCache
+    [@value, valueRef] = @value.cache o
 
     # Find all rest elements.
     restElements = traverseRest @variable.base.properties, valueRef