emilk/egui · error

Should only be called after `col`

Error message

Should only be called after `col`

What it means

Error "Should only be called after `col`" thrown in emilk/egui.

Solutions

1. Call TableBuilder::column/col before accessing row-level cell APIs that require a current column.

Example fix

table.body(|mut body| { body.row(18.0, |mut row| { row.col(|ui| { ui.label("cell"); }); }); });

When it happens

Trigger: Thrown at crates/egui_extras/src/table.rs:1352 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of emilk/egui@8fb03c9ae9 (2026-08-19). Data as JSON: /api/errors/902bb31b7fcf7231. Report an issue: GitHub.

Appendix: source

Thrown at crates/egui_extras/src/table.rs:1352

    #[inline]
    pub fn set_hovered(&mut self, hovered: bool) {
        self.hovered = hovered;
    }

    /// Set the overline state for this row. The overline is a line above the row,
    /// usable for e.g. visually grouping rows.
    #[inline]
    pub fn set_overline(&mut self, overline: bool) {
        self.overline = overline;
    }

    /// Returns a union of the [`Response`]s of the cells added to the row up to this point.
    ///
    /// You need to add at least one row to the table before calling this function.
    pub fn response(&self) -> Response {
        self.response
            .clone()
            .expect("Should only be called after `col`")
    }

    /// Returns the index of the row.
    #[inline]
    pub fn index(&self) -> usize {
        self.row_index
    }

    /// Returns the index of the column. Incremented after a column is added.
    #[inline]
    pub fn col_index(&self) -> usize {
        self.col_index
    }
}

impl Drop for TableRow<'_, '_> {
    #[inline]
    fn drop(&mut self) {

View on GitHub (pinned to 8fb03c9ae9)