From 3fb9a265fe9d613696b0bddb9e0bb81cc60594fe Mon Sep 17 00:00:00 2001
From: Brian Hulette <brian.hulette@ccri.com>
Date: Wed, 28 Feb 2018 12:30:01 -0500
Subject: [PATCH] Fix bug in DictionaryVector with nullable indices

---
 js/src/vector.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/src/vector.ts b/js/src/vector.ts
index f36c691e1bd27..6c2bbbb86a7d2 100644
--- a/js/src/vector.ts
+++ b/js/src/vector.ts
@@ -399,6 +399,9 @@ export class DictionaryVector<T extends DataType = DataType> extends Vector<Dict
     public readonly dictionary: Vector<T>;
     constructor(data: Data<Dictionary<T>>, view: View<Dictionary<T>> = new DictionaryView<T>(data.dictionary, new IntVector(data.indices))) {
         super(data as Data<any>, view);
+        if (view instanceof ValidityView) {
+            view = (view as any).view;
+        }
         if (data instanceof DictionaryData && view instanceof DictionaryView) {
             this.indices = view.indices;
             this.dictionary = data.dictionary;