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diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -6948,11 +6948,15 @@ nsWindow::GetWaylandDisplay()
GdkDisplay* gdkDisplay = gdk_display_get_default();
return mIsX11Display ? nullptr :
sGdkWaylandDisplayGetWlDisplay(gdkDisplay);
}
wl_surface*
nsWindow::GetWaylandSurface()
{
- return moz_container_get_wl_surface(MOZ_CONTAINER(mContainer));
+ if (mContainer)
+ return moz_container_get_wl_surface(MOZ_CONTAINER(mContainer));
+
+ NS_WARNING("nsWindow::GetWaylandSurfaces(): We don't have any mContainer for drawing!");
+ return nullptr;
}
#endif
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