allow chunked decoder to read poll after eof

Author: jbr

src/chunked/decoder.rs

@@ -207,6 +207,10 @@ impl<R: Read + Unpin> Read for ChunkedDecoder<R> {
     ) -> Poll<io::Result<usize>> {
         let this = &mut *self;
 
+        if let State::Done = this.state {
+            return Poll::Ready(Ok(0));
+        }
+
         let mut n = std::mem::replace(&mut this.current, 0..0);
         let buffer = std::mem::replace(&mut this.buffer, POOL.alloc(INITIAL_CAPACITY));
         let mut needs_read = !matches!(this.state, State::Chunk(_, _));

src/lib.rs

@@ -88,8 +88,8 @@
 //! }
 //! ```
 
-#![forbid(unsafe_code, rust_2018_idioms)]
-#![deny(missing_debug_implementations, nonstandard_style)]
+#![forbid(unsafe_code)]
+#![deny(missing_debug_implementations, nonstandard_style, rust_2018_idioms)]
 #![warn(missing_docs, missing_doc_code_examples, unreachable_pub)]
 #![cfg_attr(test, deny(warnings))]
 #![allow(clippy::if_same_then_else)]