From 605f4a588b2f53110d437f4d6274811a6c54f023 Mon Sep 17 00:00:00 2001
From: John Bauer <horatio@gmail.com>
Date: Fri, 13 Oct 2023 08:59:04 -0700
Subject: [PATCH] Throws a more descriptive NPE if a token comes back null, as
 that will eventually crash anyway

---
 .../stanford/nlp/pipeline/ProtobufAnnotationSerializer.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/edu/stanford/nlp/pipeline/ProtobufAnnotationSerializer.java b/src/edu/stanford/nlp/pipeline/ProtobufAnnotationSerializer.java
index d270c48a0c..ecfd7ce447 100644
--- a/src/edu/stanford/nlp/pipeline/ProtobufAnnotationSerializer.java
+++ b/src/edu/stanford/nlp/pipeline/ProtobufAnnotationSerializer.java
@@ -2418,6 +2418,9 @@ private static SemanticGraph fromProto(CoreNLPProtos.DependencyGraph proto, List
       } else {
         // TODO: index based on emptyIndex as well
         token = originalLabels.get(in.getIndex(), 0);
+        if (token == null) {
+          throw new NullPointerException("Could not find the token for index " + in.getIndex());
+        }
       }
       IndexedWord word;
       if (in.hasCopyAnnotation() && in.getCopyAnnotation() > 0) {