From 314dafa1646f98fc54efd7399f320ca9d4484121 Mon Sep 17 00:00:00 2001
From: Thomas von Dein <tom@vondein.org>
Date: Fri, 21 Nov 2025 14:01:46 +0100
Subject: [PATCH] fix substring allocation

---
 engine.cc | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/engine.cc b/engine.cc
index 1dd1182..74b65a3 100644
--- a/engine.cc
+++ b/engine.cc
@@ -325,17 +325,20 @@ void Engine::regexp() {
             cerr << "Token " << config.token << " did not produce sub strings!\n";
           else {
             ovector = pcre2_get_ovector_pointer(match_data);
+            const char *constline = const_cast<char*>(line.c_str());
+
             
-            for (int i = 0; i < num; i++)  {
-              char * substring_start =  const_cast<char*>(line.c_str()) + ovector[2*i];
+          for (int i = 1; i < num; i++)  {
+              PCRE2_SPTR substring_start = (PCRE2_SPTR8)constline + ovector[2*i];
+              PCRE2_SIZE substring_length = ovector[2*i+1] - ovector[2*i];
 
-              if (i == 2) {
-                  break;
-              }
-                        
-              subs[i] = substring_start;
+              char *part = (char *)malloc(substring_length+1);
+              part = strncpy(part, (char *)substring_start, substring_length);
+
+              subs[i-1] = part;
+              free(part);
             }
-
+            
             if(config.reverse) {
               value = subs[0];
               key   = subs[1];
@@ -348,7 +351,6 @@ void Engine::regexp() {
           
           delete[] subs;
 
-          
           line = "";
         }
         value = encode(value);