Fix crash on incorrect options used

1 files changed, 4 insertions, 2 deletions

diff --git a/src/QuickMedia.cpp b/src/QuickMedia.cpp
index 6db58c9..7d7ae24 100644
--- a/src/QuickMedia.cpp
+++ b/src/QuickMedia.cpp
@@ -199,13 +199,15 @@ namespace QuickMedia {
     }
 
     Program::~Program() {
-        running = false;
-        if(upscale_images) {
+        if(upscale_images && running) {
+            running = false;
             {
                 std::unique_lock<std::mutex> lock(image_upscale_mutex);
                 image_upscale_cv.notify_one();
             }
             image_upscale_thead.join();
+        } else {
+            running = false;
         }
         delete related_media_body;
         delete body;