DioxusLabs/dioxus · error

text slot

Error message

text slot

What it means

`unchecked_mounted_dynamic_text_node` reads a dynamic slot and `expect`s it to hold text. The 'unchecked' variant skips the Option return, so this panic fires when callers request the text element for a slot that is empty or holds a different node kind — an internal misuse of the unchecked accessor.

Source

Thrown at packages/core/src/mount.rs:410

    pub(crate) fn clear_mounted_dynamic_node_slot(&self, mount: MountId, dyn_node_idx: usize) {
        self.set_mounted_dynamic_node_slot(mount, dyn_node_idx, MountedDynamicNodeSlot::Empty);
    }

    pub(crate) fn mounted_dynamic_text_node(
        &self,
        mount: MountId,
        dyn_node_idx: usize,
    ) -> Option<MountedElementId> {
        self.with_mount(mount, |mount| mount.dynamic_slot(dyn_node_idx).text())
    }

    pub(crate) fn unchecked_mounted_dynamic_text_node(
        &self,
        mount: MountId,
        dyn_node_idx: usize,
    ) -> MountedElementId {
        self.mounted_dynamic_text_node(mount, dyn_node_idx)
            .expect("text slot")
    }

    pub(crate) fn set_mounted_dynamic_text_node(
        &self,
        mount: MountId,
        dyn_node_idx: usize,
        value: MountedElementId,
    ) {
        self.set_mounted_dynamic_node_slot(
            mount,
            dyn_node_idx,
            MountedDynamicNodeSlot::Text(value),
        );
    }

    pub(crate) fn clear_mounted_fragment_children(&self, mount: MountId, dyn_node_idx: usize) {
        self.with_mount_mut(mount, |mount| {
            *mount.dynamic_slot_mut(dyn_node_idx) = PackedMountedSlot::empty();

View on GitHub (pinned to 24f6a829df)

Solutions

1. This is an internal invariant about text slots. Report it with a minimal reproduction to the Dioxus issue tracker.

When it happens

Trigger: Thrown at packages/core/src/mount.rs:410 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/fab88d63b0118b7c. Report an issue: GitHub.