From cf3391027b7e422dd7b1f9a8678da731273835dc Mon Sep 17 00:00:00 2001
From: Nikos Ftylitakis <nikos.ftylitakis@feron-tech.com>
Date: Thu, 19 Mar 2020 12:17:58 +0200
Subject: [PATCH] add extra check in QRFinderPatternFinder to avoid
 segmentation. Must be investigated if it is work-around that hides issue or
 if it is a valid check. #164

---
 src/zxing/zxing/qrcode/detector/QRFinderPatternFinder.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/zxing/zxing/qrcode/detector/QRFinderPatternFinder.cpp b/src/zxing/zxing/qrcode/detector/QRFinderPatternFinder.cpp
index c90308f..42306ad 100644
--- a/src/zxing/zxing/qrcode/detector/QRFinderPatternFinder.cpp
+++ b/src/zxing/zxing/qrcode/detector/QRFinderPatternFinder.cpp
@@ -512,11 +512,16 @@ Ref<FinderPatternInfo> FinderPatternFinder::find(DecodeHints const& hints) {
     }
   }
 
-  if(this->possibleCenters_.size() < 3) {
+  if(possibleCenters_.size() < 3) {
     throw zxing::ReaderException("no possible centers found");
   }
 
   vector< Ref <FinderPattern> > patternInfo = selectBestPatterns();
+
+  if(patternInfo.size() != 3) {
+    throw zxing::ReaderException("no pattern info found");
+  }
+
   vector< Ref <ResultPoint> > patternInfoResPoints;
 
   for(size_t i=0; i<patternInfo.size(); i++)