From 421c90786d418ace10083d6b48a041f2459a56f2 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@cs.stanford.edu>
Date: Sun, 30 May 2021 13:30:10 -0700
Subject: [PATCH] segment: Fix implementation of is_all_spaces().

---
 src/language/lexer/segment.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/language/lexer/segment.c b/src/language/lexer/segment.c
index 8d17ce38fe..1a8e8a6b5f 100644
--- a/src/language/lexer/segment.c
+++ b/src/language/lexer/segment.c
@@ -227,7 +227,7 @@ is_all_spaces (const char *input_, size_t n)
   for (int ofs = 0; ofs < n; ofs += mblen)
     {
       ucs4_t uc;
-      mblen = u8_mbtouc (&uc, input, n);
+      mblen = u8_mbtouc (&uc, input + ofs, n - ofs);
       if (!lex_uc_is_space (uc))
         return false;
     }
-- 
2.30.2