1 files changed, 1 insertions, 0 deletions
diff --git a/block.c b/block.c
index 484f48ae2d..738b42046c 100644
--- a/block.c
+++ b/block.c
@@ -6826,6 +6826,7 @@ bool coroutine_fn bdrv_co_is_inserted(BlockDriverState *bs)
     BlockDriver *drv = bs->drv;
     BdrvChild *child;
     IO_CODE();
+    assert_bdrv_graph_readable();
 
     if (!drv) {
         return false;