fixes

Signed-off-by: Robert Kruszewski <github@robertk.io>

Author: robert3005

encodings/fastlanes/src/lib.rs

@@ -21,7 +21,6 @@ pub(crate) const FL_CHUNK_SIZE: usize = 1024;
 use bitpacking::compute::is_constant::BitPackedIsConstantKernel;
 use r#for::compute::is_constant::FoRIsConstantKernel;
 use r#for::compute::is_sorted::FoRIsSortedKernel;
-use itertools::Itertools;
 use vortex_array::aggregate_fn::AggregateFnVTable;
 use vortex_array::aggregate_fn::fns::is_constant::IsConstant;
 use vortex_array::aggregate_fn::fns::is_sorted::IsSorted;
@@ -84,14 +83,17 @@ pub(crate) fn fill_forward_nulls<T: Copy + Default>(
                 Err(to_fill) => {
                     let mut to_fill_mut = BufferMut::<T>::with_capacity(to_fill.len());
                     let mut last_valid = T::default();
-                    for (i, (v, out)) in to_fill.iter().zip_eq(to_fill_mut.iter_mut()).enumerate() {
+                    for (i, (v, out)) in to_fill
+                        .iter()
+                        .zip(to_fill_mut.spare_capacity_mut().iter_mut())
+                        .enumerate()
+                    {
                         if bit_buffer.value(i) {
                             last_valid = *v;
-                            *out = *v;
-                        } else {
-                            *out = last_valid;
                         }
+                        out.write(last_valid);
                     }
+                    unsafe { to_fill_mut.set_len(to_fill.len()) };
                     to_fill_mut.freeze()
                 }
             }