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-rw-r--r--ui/console.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ui/console.c b/ui/console.c
index 419b098c11..0cbe5033dd 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1538,6 +1538,8 @@ void dpy_gfx_replace_surface(QemuConsole *con,
DisplaySurface *old_surface = con->surface;
DisplayChangeListener *dcl;
+ assert(old_surface != surface);
+
con->surface = surface;
QLIST_FOREACH(dcl, &s->listeners, next) {
if (con != (dcl->con ? dcl->con : active_console)) {