From 3b9e384ecb6e06c5f0ebc2dcf6aae6d82e35ae19 Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Wed, 17 Nov 2021 15:01:13 +1000
Subject: [PATCH] prevent loading garbage

---
 include/armadillo_bits/diskio_meat.hpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/armadillo_bits/diskio_meat.hpp b/include/armadillo_bits/diskio_meat.hpp
index c9b835f2..8be6c6ab 100644
--- a/include/armadillo_bits/diskio_meat.hpp
+++ b/include/armadillo_bits/diskio_meat.hpp
@@ -469,7 +469,16 @@ diskio::convert_token(eT& val, const std::string& token)
       {
       // unsigned integer
       
-      if(str[0] == '-')  { val = eT(0);  return true; }
+      if((str[0] == '-') && (N >= 2))
+        {
+        const char* str_offset1 = &(str[1]);
+        
+        std::strtoull(str_offset1, &endptr, 10);
+        
+        if(str_offset1 == endptr)  { return false; }
+        
+        val = eT(0);  return true;
+        }
       
       val = eT( std::strtoull(str, &endptr, 10) );
       }