From a1be01185cabdaf8f6858f629099190b3662b402 Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal+gh@gmail.com>
Date: Wed, 28 Feb 2018 12:27:09 +0100
Subject: [PATCH] Fix array out of bounds error in Span

---
 spacy/tokens/span.pyx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/spacy/tokens/span.pyx b/spacy/tokens/span.pyx
index f794e1d3f..aa085b59f 100644
--- a/spacy/tokens/span.pyx
+++ b/spacy/tokens/span.pyx
@@ -294,6 +294,7 @@ cdef class Span:
             cdef int i
             if self.doc.is_parsed:
                 root = &self.doc.c[self.start]
+                n = 0
                 while root.head != 0:
                     root += root.head
                     n += 1
@@ -307,8 +308,10 @@ cdef class Span:
                     start += -1
                 # find end of the sentence
                 end = self.end
-                while self.doc.c[end].sent_start != 1:
+                n = 0
+                while end < self.doc.length and self.doc.c[end].sent_start != 1:
                     end += 1
+                    n += 1
                     if n >= self.doc.length:
                         break
                 #