1 files changed, 6 insertions, 1 deletions
diff --git a/src/library/layout/stack.rs b/src/library/layout/stack.rs
index 828ff8e3..9c2cbccd 100644
--- a/src/library/layout/stack.rs
+++ b/src/library/layout/stack.rs
@@ -194,7 +194,12 @@ impl<'a> StackLayouter<'a> {
 
         let frames = node.layout(ctx, &self.regions, styles)?;
         let len = frames.len();
-        for (i, frame) in frames.into_iter().enumerate() {
+        for (i, mut frame) in frames.into_iter().enumerate() {
+            // Set the generic block role.
+            if frame.role().map_or(true, Role::is_weak) {
+                Arc::make_mut(&mut frame).apply_role(Role::GenericBlock);
+            }
+
             // Grow our size, shrink the region and save the frame for later.
             let size = frame.size.to_gen(self.axis);
             self.used.main += size.main;