syncqt: Add the missing is_open check to writeIfDifferent

Pick-to: 6.5
Change-Id: I2a969483d20f250083c1a262bd3bfc696a7f0df4
Reviewed-by: Amir Masoud Abdol <amir.abdol@qt.io>
(cherry picked from commit a86fb92d4bc1a64703cabf351035efc861ea54dd)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/tools/syncqt/main.cpp b/src/tools/syncqt/main.cpp
index 5364606942..442d07a0a6 100644
--- a/src/tools/syncqt/main.cpp
+++ b/src/tools/syncqt/main.cpp
@@ -1760,6 +1760,10 @@ bool SyncScanner::writeIfDifferent(const std::string &outputFile, const std::str
         memset(rdBuffer, 0, bufferSize);
 
         std::ifstream ifs(outputFile, std::fstream::in);
+        if (!ifs.is_open()) {
+            std::cerr << "Unable to open " << outputFile << " for comparison." << std::endl;
+            return false;
+        }
         std::streamsize currentPos = 0;
 
         std::size_t bytesRead = 0;