safety note & bump version

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "lz4"
 license = "MIT"
-version = "1.28.0"
+version = "1.28.1"
 readme = "README.md"
 authors = [ "Jens Heyens <[email protected]>", "Artem V. Navrotskiy <[email protected]>", "Patrick Marks <[email protected]>"]
 description = "Rust LZ4 bindings library."

src/decoder.rs

@@ -5,11 +5,14 @@ use std::ptr;
 
 const BUFFER_SIZE: usize = 32 * 1024;
 
+// NOTE: unsafe to device Clone or Copy, otherwise
+// there can be multiple copies of the same inner LZ4 pointer
 #[derive(Debug)]
 struct DecoderContext {
     c: LZ4FDecompressionContext,
 }
 
+// NOTE: unsafe to derive Clone or Copy
 #[derive(Debug)]
 pub struct Decoder<R> {
     c: DecoderContext,