emilk/egui · error

Memory broken: no area for the current viewport

Error message

Memory broken: no area for the current viewport

What it means

Error "Memory broken: no area for the current viewport" thrown in emilk/egui.

Source

Thrown at crates/egui/src/memory/mod.rs:829

        // Clean up abandoned popups.
        if let Some(popup) = self.popups.get_mut(&self.viewport_id) {
            if popup.open_this_frame {
                popup.open_this_frame = false;
            } else {
                self.popups.remove(&self.viewport_id);
            }
        }
    }

    pub(crate) fn set_viewport_id(&mut self, viewport_id: ViewportId) {
        self.viewport_id = viewport_id;
    }

    /// Access memory of the [`Area`](crate::containers::area::Area)s, such as `Window`s.
    pub fn areas(&self) -> &Areas {
        self.areas
            .get(&self.viewport_id)
            .expect("Memory broken: no area for the current viewport")
    }

    /// Access memory of the [`Area`](crate::containers::area::Area)s, such as `Window`s.
    pub fn areas_mut(&mut self) -> &mut Areas {
        self.areas.entry(self.viewport_id).or_default()
    }

    /// Top-most layer at the given position.
    pub fn layer_id_at(&self, pos: Pos2) -> Option<LayerId> {
        let layer_id = self.areas().layer_id_at(pos, &self.to_global)?;
        if self.is_above_modal_layer(layer_id) {
            Some(layer_id)
        } else {
            self.top_modal_layer()
        }
    }

    /// An iterator over all layers. Back-to-front, top is last.

View on GitHub (pinned to d802a982ce)

When it happens

Trigger: Thrown at crates/egui/src/memory/mod.rs:829 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of emilk/egui@d802a982ce (2026-08-16). Data as JSON: /api/errors/671bb293bff8cdc6. Report an issue: GitHub.