Fix crash when shuffling empty deck,

fixes https://etg.dek.im/soi.htm
serprex · Jun 29, 2024 · 56a186f · 56a186f
1 parent 5542832
commit 56a186f
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/rs/src/rng.rs b/src/rs/src/rng.rs
@@ -49,9 +49,11 @@ impl Pcg32 {
 
 	pub fn shuffle<T>(&self, a: &mut [T]) {
 		let al = a.len() as u32;
-		for i in 0..al - 1 {
-			let j = self.upto(al - i);
-			a.swap(i as usize, i as usize + j as usize)
+		if al > 1 {
+			for i in 0..al - 1 {
+				let j = self.upto(al - i);
+				a.swap(i as usize, i as usize + j as usize)
+			}
 		}
 	}