fix

plonky2/src/gadgets/curve.rs

@@ -95,6 +95,16 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
         AffinePointTarget { x: x3, y: y3 }
     }
 
+    pub fn curve_repeated_double<C: Curve>(&mut self, p: &AffinePointTarget<C>, n: usize) -> AffinePointTarget<C> {
+        let mut result = p.clone();
+
+        for _ in 0..n {
+            result = self.curve_double(&result);
+        }
+
+        result
+    }
+
     // Add two points, which are assumed to be non-equal.
     pub fn curve_add<C: Curve>(
         &mut self,

plonky2/src/gadgets/curve_windowed_mul.rs

@@ -82,7 +82,7 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
         let windows = self.split_nonnative_to_4_bit_limbs(n);
         let m = C::ScalarField::BITS / WINDOW_SIZE;
         for i in (0..m).rev() {
-            result = self.curve_double(&result);
+            result = self.curve_repeated_double(&result, WINDOW_SIZE);
             let window = windows[i];
 
             let to_add = self.random_access_curve_points(window, precomputation.clone());
@@ -147,7 +147,7 @@ mod tests {
     }
 
     #[test]
-    fn test_curve_mul_windowed() -> Result<()> {
+    fn test_curve_windowed_mul() -> Result<()> {
         const D: usize = 2;
         type C = PoseidonGoldilocksConfig;
         type F = <C as GenericConfig<D>>::F;