fix crash on empty group in rule output

2024-05-06 09:54:56 +02:00 · 2024-05-06 09:54:56 +02:00 · 17e8291281
commit 17e8291281
parent 4d61184edd
1 changed files with 5 additions and 3 deletions
--- a/petri/src/lib.rs
+++ b/petri/src/lib.rs
@ -411,10 +411,12 @@ impl Dish {
 					}
 					RuleCellTo::GroupRandom(group_id) => {
 						let group = &self.cell_groups[group_id];
+						if !group.cells.is_empty() {
 							let i = random::<usize>() % group.cells.len();
 							let cell = group.cells[i];
 							self.set_cell(px, py, cell);
 						}
+					}
 					RuleCellTo::Copy(x, y) => {
 						let cell = old_state[x + y * variant.width];
 						if let Some(cell) = cell {