update deps: rust-gpu: 985007fc -> dcf37b75, associated rust-toolchain: nightly-2022-08-29 -> nightly-2022-09-25

verified working: cargo test; cargo run --release --bin sr_latch; cargo run --release --bin wavefront

crates/cross/src/dim/dim_slice.rs

@@ -1,4 +1,5 @@
 use core::convert::{AsMut, AsRef};
+#[cfg(feature = "iter")]
 use core::iter::Zip;
 use core::ops::{Index, IndexMut};
 
@@ -123,7 +124,10 @@ impl<T: IntoIterator> IntoIterator for DimSlice<T> {
 }
 
 pub struct DimIter {
+    // fields are unused if `iter` feature is disabled
+    #[allow(unused)]
     idx: Vec3u,
+    #[allow(unused)]
     dim: Vec3u,
 }
 

crates/cross/src/dim/offset_dim_slice.rs

@@ -1,4 +1,5 @@
 use core::convert::{AsMut, AsRef};
+#[cfg(feature = "iter")]
 use core::iter::Zip;
 use core::ops::{Index, IndexMut};
 
@@ -81,7 +82,10 @@ impl<T: IntoIterator> IntoIterator for OffsetDimSlice<T> {
 }
 
 pub struct OffsetDimIter {
+    // fields are unused if `iter` feature is disabled
+    #[allow(unused)]
     offset: Vec3u,
+    #[allow(unused)]
     inner: DimIter,
 }