diff --git a/crates/engine/examples/fill_handle_perf.rs b/crates/engine/examples/fill_handle_perf.rs
index 0480c0afb..5e9ea423c 100644
--- a/crates/engine/examples/fill_handle_perf.rs
+++ b/crates/engine/examples/fill_handle_perf.rs
@@ -2,6 +2,8 @@
 //! row-by-row `value_ref` loop from `grid.rs` vs. `Sheet::last_contiguous_nonempty`.
 //! `cargo run --release -p gridcraft-engine --example fill_handle_perf -- [rows]`
 
+#![allow(clippy::disallowed_methods)] // a native-only benchmark: wasm never runs it
+
 use std::time::Instant;
 
 use gridcraft_engine::Session;
diff --git a/crates/ui-egui/src/grid.rs b/crates/ui-egui/src/grid.rs
index 7ac6a848c..56fec08ee 100644
--- a/crates/ui-egui/src/grid.rs
+++ b/crates/ui-egui/src/grid.rs
@@ -2055,7 +2055,7 @@ fn interact(app: &mut SheetApp, ui: &mut egui::Ui, resp: &egui::Response, geo: &
         let src = sel.current();
         let neighbour = if src.start.col > 0 { src.start.col - 1 } else { src.end.col + 1 };
         let cap = src.end.row.saturating_add(1_000_000).min(MAX_ROWS - 1);
-        let last = if src.end.row + 1 <= cap { sh.last_contiguous_nonempty(neighbour, src.end.row + 1, cap) } else { src.end.row };
+        let last = if src.end.row < cap { sh.last_contiguous_nonempty(neighbour, src.end.row + 1, cap) } else { src.end.row };
         if last > src.end.row {
             let target = RangeRef::new(src.start, CellRef::new(last, src.end.col));
             let _ = app.run("edit.autoFill", json!({"source": src.a1(), "target": target.a1()}));