Don't panic on drop

src/frame/compress.rs

@@ -30,7 +30,11 @@ use crate::block::WINDOW_SIZE;
 /// writer in a `std::io::BufWriter`.
 ///
 /// To ensure a well formed stream the encoder must be finalized by calling
-/// either `finish` or `try_finish()` methods.
+/// either the [`finish()`], [`try_finish()`], or [`auto_finish()`] methods.
+///
+/// [`finish()`]: Self::finish
+/// [`try_finish()`]: Self::try_finish
+/// [`auto_finish()`]: Self::auto_finish
 ///
 /// # Example 1
 /// Serializing json values into a compressed file.
@@ -113,9 +117,12 @@ impl<W: io::Write> FrameEncoder<W> {
 
     /// Returns a wrapper around `self` that will finish the stream on drop.
     ///
-    /// # Panic
+    /// # Note
+    /// Errors on drop get silently ignored. If you want to handle errors then use [`finish()`] or
+    /// [`try_finish()`] instead.
     ///
-    /// Panics on drop if an error happens when finishing the stream.
+    /// [`finish()`]: Self::finish
+    /// [`try_finish()`]: Self::try_finish
     pub fn auto_finish(self) -> AutoFinishEncoder<W> {
         AutoFinishEncoder {
             encoder: Some(self),
@@ -387,12 +394,17 @@ impl<W: io::Write> io::Write for FrameEncoder<W> {
     }
 }
 
-/// A wrapper around an `FrameEncoder<W>` that finishes the stream on drop.
+/// A wrapper around an [`FrameEncoder<W>`] that finishes the stream on drop.
+///
+/// This can be created by the [`auto_finish()`] method on the [`FrameEncoder<W>`].
 ///
-/// This can be created by the [`auto_finish()`] method on the [`FrameEncoder`].
+/// # Note
+/// Errors on drop get silently ignored. If you want to handle errors then use [`finish()`] or
+/// [`try_finish()`] instead.
 ///
-/// [`auto_finish()`]: Encoder::auto_finish
-/// [`Encoder`]: Encoder
+/// [`finish()`]: FrameEncoder::finish
+/// [`try_finish()`]: FrameEncoder::try_finish
+/// [`auto_finish()`]: FrameEncoder::auto_finish
 pub struct AutoFinishEncoder<W: Write> {
     // We wrap this in an option to take it during drop.
     encoder: Option<FrameEncoder<W>>,
@@ -401,9 +413,7 @@ pub struct AutoFinishEncoder<W: Write> {
 impl<W: io::Write> Drop for AutoFinishEncoder<W> {
     fn drop(&mut self) {
         if let Some(mut encoder) = self.encoder.take() {
-            if let Err(err) = encoder.try_finish() {
-                panic!("Error when flushing frame on drop {:?} ", err);
-            }
+            let _ = encoder.try_finish();
         }
     }
 }

src/frame/mod.rs

@@ -25,7 +25,7 @@ pub(crate) mod compress;
 pub(crate) mod decompress;
 pub(crate) mod header;
 
-pub use compress::FrameEncoder;
+pub use compress::{AutoFinishEncoder, FrameEncoder};
 pub use decompress::FrameDecoder;
 pub use header::{BlockMode, BlockSize, FrameInfo};