From db9866677ebea77fd065248135f084139304a06c Mon Sep 17 00:00:00 2001
From: Phil Nash <github@philnash.me>
Date: Mon, 13 Mar 2017 10:22:02 +0000
Subject: [PATCH] =?UTF-8?q?Don=E2=80=99t=20ref=20past=20end=20of=20string?=
 =?UTF-8?q?=20fixes=20#830?=
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---
 include/external/clara.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/external/clara.h b/include/external/clara.h
index cbcafd56..4200d58f 100644
--- a/include/external/clara.h
+++ b/include/external/clara.h
@@ -554,12 +554,13 @@ namespace Clara {
         }
 
         void parseIntoTokens( std::string const& arg, std::vector<Token>& tokens ) {
-            for( std::size_t i = 0; i <= arg.size(); ++i ) {
+            for( std::size_t i = 0; i < arg.size(); ++i ) {
                 char c = arg[i];
                 if( c == '"' )
                     inQuotes = !inQuotes;
                 mode = handleMode( i, c, arg, tokens );
             }
+            mode = handleMode( arg.size(), '\0', arg, tokens );
         }
         Mode handleMode( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
             switch( mode ) {
@@ -592,6 +593,7 @@ namespace Clara {
                 default: from = i; return ShortOpt;
             }
         }
+
         Mode handleOpt( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
             if( std::string( ":=\0", 3 ).find( c ) == std::string::npos )
                 return mode;