Fix #5004: incorrect compiled code when a destructuring array contains accessors (#5005)

Author: zdenko

lib/coffeescript/nodes.js

@@ -2426,7 +2426,8 @@ exports.Assign = class Assign extends Base
       vvarText = ref
 
     slicer = (type) -> (vvar, start, end = no) ->
-      args = [new IdentifierLiteral(vvar), new NumberLiteral(start)]
+      vvar = new IdentifierLiteral vvar unless vvar instanceof Value
+      args = [vvar, new NumberLiteral(start)]
       args.push new NumberLiteral end if end
       slice = new Value (new IdentifierLiteral utility type, o), [new Access new PropertyName 'call']
       new Value new Call slice, args
@@ -2517,7 +2518,7 @@ exports.Assign = class Assign extends Base
       if rightObjs.length isnt 0
         # Slice or splice `objects`.
         refExp = switch
-          when isSplat then compSplice objects[expIdx].unwrapAll().value, rightObjs.length * -1
+          when isSplat then compSplice new Value(objects[expIdx].name), rightObjs.length * -1
           when isExpans then compSlice vvarText, rightObjs.length * -1
         if complexObjects rightObjs
           restVar = refExp

src/nodes.coffee

@@ -959,7 +959,7 @@ test "#4878: Compile error when using destructuring with a splat or expansion in
     ([first, ...] = list); first
 
   f4 = (list) ->
-    ([first, ...rest] = list); rest
+    ([first, rest...] = list); rest
 
   arrayEq f1(arr), arr
   arrayEq f2(arr), arr
@@ -979,9 +979,39 @@ test "#4878: Compile error when using destructuring with a splat or expansion in
   bar = (list) ->
     ret =
       if list?.length > 0
-        [first, ...rest] = list
+        [first, rest...] = list
         [first, rest]
       else
         []
 
   arrayEq bar(arr), ['a', ['b', 'c', 'd']]
+
+
+test "#5004: array destructuring with accessors", ->
+  obj =
+    arr: ['a', 'b', 'c', 'd']
+    list: {}
+    f1: ->
+      [@first, @rest...] = @arr
+    f2: ->
+      [@second, @third..., @last] = @rest
+    f3: ->
+      [@list.a, @list.middle..., @list.d] = @arr
+
+  obj.f1()
+  eq obj.first, 'a'
+  arrayEq obj.rest, ['b', 'c', 'd']
+
+  obj.f2()
+  eq obj.second, 'b'
+  arrayEq obj.third, ['c']
+  eq obj.last, 'd'
+
+  obj.f3()
+  eq obj.list.a, 'a'
+  arrayEq obj.list.middle, ['b', 'c']
+  eq obj.list.d, 'd'
+
+  [obj.list.middle..., d] = obj.arr
+  eq d, 'd'
+  arrayEq obj.list.middle, ['a', 'b', 'c']