Index: qtwayland-everywhere-src-5.14.0-alpha/src/client/qwaylandinputdevice.cpp
===================================================================
--- qtwayland-everywhere-src-5.14.0-alpha.orig/src/client/qwaylandinputdevice.cpp
+++ qtwayland-everywhere-src-5.14.0-alpha/src/client/qwaylandinputdevice.cpp
@@ -968,6 +968,9 @@ bool QWaylandInputDevice::Pointer::Frame
     case axis_source_finger:
     case axis_source_continuous:
         return !delta.isNull();
+    default:
+        Q_UNREACHABLE();
+        return false;
     }
 }