fix(viewer): destroy the Qt objects before interpreter exit

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
+- The Console Hub no longer crashes on exit (segfault or `corrupted double-linked list` abort in `PySide::destroyQCoreApplication`, leaving a core dump on every quit). The window and tray icon are now destroyed before Python shuts down.
 - **GC573 green/white speckles and audio crackle on HDMI 2.0 sources (4K60, 1440p120):**
   - The IT6664 input receiver was left at its fixed power-on equaliser (RS `0x1f`, forced), so >340 MHz TMDS links decoded a steady stream of wrong characters. The errors were re-encoded by the IT6664, so they showed up on the HDMI OUT passthrough too and were invisible to the IT6805. Windows was clean on the same hardware and cable.
   - New `gc573_user_rx_eq.[ch]` drives both receivers (IT6664 input and IT6805 capture share the same ITE receiver core). On HDMI 2.0 lock it measures per-lane TMDS character errors (CED), leaves error-free links alone, and otherwise runs hardware auto-EQ with DFE taps, falling back to a per-lane RS sweep and skew retraining scored by measured errors.

tools/everlive/everlive_viewer.py

@@ -5020,6 +5020,25 @@ def closeEvent(self, event):
             event.accept()
 
 
+def _destroy_qt_objects(app, window):
+    """Tear the Qt object tree down while Python still owns it.
+
+    Leaving it to PySide's interpreter-exit cleanup destroys some QObjects
+    twice (segfault or "corrupted double-linked list" abort in
+    PySide::destroyQCoreApplication on every quit).
+    """
+    try:
+        tray = getattr(window, "tray_icon", None)
+        if tray is not None:
+            tray.hide()
+        window.hide()
+        window.deleteLater()
+        app.sendPostedEvents(None, QEvent.Type.DeferredDelete)
+        app.processEvents()
+    except Exception:
+        pass
+
+
 def main():
     parser = argparse.ArgumentParser(description="EverLive - Live Gamer 4K Console Gaming Screen")
     parser.add_argument("-f", "--fullscreen", action="store_true", help="Launch directly in fullscreen")
@@ -5193,7 +5212,10 @@ def sig_handler(sig, frame):
                             headless_start=args.headless, v4l2_device=args.v4l2)
         if not args.tray:
             window.show()
-        sys.exit(app.exec())
+        code = app.exec()
+        _destroy_qt_objects(app, window)
+        del window
+        sys.exit(code)
 
 
 if __name__ == "__main__":