remove unused code

fuzz/Cargo.toml

@@ -12,6 +12,7 @@ cargo-fuzz = true
 debug = true
 
 [features]
+default = ["libz-rs-sys/rust-allocator"]
 c-allocator = ["libz-rs-sys/c-allocator"]
 rust-allocator = ["libz-rs-sys/rust-allocator"]
 
@@ -31,6 +32,7 @@ features =  ["__internal-fuzz"]
 
 [dependencies.libz-rs-sys]
 path = "../libz-rs-sys"
+default-features = false
 
 # Prevent this from interfering with workspaces
 [workspace]

fuzz/fuzz_targets/end_to_end.rs

@@ -96,8 +96,8 @@ fn compress_slice_ng<'a>(
         total_out: 0,
         msg: std::ptr::null_mut(),
         state: std::ptr::null_mut(),
-        zalloc: zlib_rs::allocate::zcalloc,
-        zfree: zlib_rs::allocate::zcfree,
+        zalloc: zlib_rs::allocate::zalloc_c,
+        zfree: zlib_rs::allocate::zfree_c,
         opaque: std::ptr::null_mut(),
         data_type: 0,
         adler: 0,
@@ -177,8 +177,8 @@ fn uncompress_slice_ng<'a>(
         total_out: 0,
         msg: std::ptr::null_mut(),
         state: std::ptr::null_mut(),
-        zalloc: ::zlib_rs::allocate::zcalloc,
-        zfree: ::zlib_rs::allocate::zcfree,
+        zalloc: zlib_rs::allocate::zalloc_c,
+        zfree: zlib_rs::allocate::zfree_c,
         opaque: std::ptr::null_mut(),
         data_type: 0,
         adler: 0,

libz-rs-sys/src/lib.rs

@@ -37,6 +37,9 @@ const _: () =
 
 #[allow(unreachable_code)]
 const DEFAULT_ZALLOC: Option<alloc_func> = 'blk: {
+    // this `break 'blk'` construction exists to generate just one compile error and not other
+    // warnings when multiple allocators are configured.
+
     #[cfg(feature = "c-allocator")]
     break 'blk Some(zlib_rs::allocate::zalloc_c);
 

zlib-rs/src/crc32/pclmulqdq.rs

@@ -14,10 +14,6 @@ use crate::{crc32::slice_to_uninit, CRC32_INITIAL_VALUE};
 #[repr(C, align(16))]
 struct Align16<T>(T);
 
-#[derive(Debug)]
-#[repr(C, align(32))]
-struct Align32<T>(T);
-
 #[cfg(target_arch = "x86_64")]
 const fn reg(input: [u32; 4]) -> __m128i {
     // safety: any valid [u32; 4] represents a valid __m128i