From 1b7c22677909384e1d84d8f72bba4efc1b4e9330 Mon Sep 17 00:00:00 2001
From: Mark Thom <markjordanthom@gmail.com>
Date: Fri, 1 May 2020 10:29:10 -0600
Subject: [PATCH] correct failing character match in compare_pstr_to_string
 (#397)

---
 src/prolog/machine/machine_state.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/prolog/machine/machine_state.rs b/src/prolog/machine/machine_state.rs
index a2849aeb..2194c3c1 100644
--- a/src/prolog/machine/machine_state.rs
+++ b/src/prolog/machine/machine_state.rs
@@ -277,7 +277,7 @@ fn compare_pstr_to_string<'a>(
                         s_offset += c1.len_utf8();
                     }
                 } else {
-                    return None;
+                    return Some(s_offset);
                 }
             }
             PStrIteratee::PStrSegment(h, n) => {
-- 
2.54.0