DioxusLabs/dioxus · error

zero-node root anchor must own a static node

Error message

zero-node root anchor must own a static node

What it means

The iterator asserts that a root-level dynamic anchor with zero nodes still owns a static node at its path; the `expect` fires when the template lookup returns None. This is an internal template invariant violation from template generation, not user error.

Source

Thrown at packages/core/src/diff/template.rs:239

            let anchor = DynamicAnchor::new(self.vnode, anchor_index);
            if !anchor.is_root_level() {
                continue;
            }

            let static_root = (!anchor.is_last_static_node() && anchor.static_path().is_root())
                .then(|| {
                    self.vnode
                        .template()
                        .static_node_at_path(anchor.static_path())
                        .expect("static root anchor")
                });

            if anchor.nodes().len() > 0 {
                self.pending_static = static_root.map(|node| (anchor_index, node));
                return Some(VNodeChild::Dynamic(anchor));
            }

            let node = static_root.expect("zero-node root anchor must own a static node");
            let path = self.vnode.template().anchors()[anchor_index].static_path();
            return Some(static_child(self.vnode, node, path, Some(anchor_index)));
        }

        None
    }
}

#[derive(Clone, Copy)]
struct ElementChildCursor<'a> {
    static_children: StaticChildCursor<'a>,
    dynamic_children: DynamicChildCursor<'a>,
    next_static: Option<PositionedChild<'a>>,
    next_dynamic: Option<PositionedChild<'a>>,
}

impl<'a> ElementChildCursor<'a> {
    fn new(element: StaticElement<'a>) -> Self {

View on GitHub (pinned to 24f6a829df)

Solutions

1. This is an internal invariant about zero-node root anchors. Report it with a minimal reproduction to the Dioxus issue tracker.

When it happens

Trigger: Thrown at packages/core/src/diff/template.rs:239 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@24f6a829df (2026-08-23). Data as JSON: /api/errors/747857d9297668dd. Report an issue: GitHub.