zstd breaking changes

0.14.0

18 breaking changes, first published September 4, 2026.

• Removed zstd::stream::write::Decoder::do_finish
  zstd::stream::write::Decoder::do_finish was removed in zstd 0.14.0 crates.io
• Removed zstd::stream::write::Decoder::finish
  zstd::stream::write::Decoder::finish was removed in zstd 0.14.0 crates.io
• Behavior changed Decoder.finish
  finish() now reads the remaining frame epilogue, so the reader is positioned after the frame but may be read further. Callers relying on the old position or read count should use finish_frame() instead. github.com
• Configuration changed
  The crate now depends on zstd-safe 8.0.0. Users who pin an older zstd-safe must update that dependency. github.com
• Signature changed with_prepared_dictionary
  The with_prepared_dictionary() constructors now take a borrow of the dictionary that must outlive the stream. Code that drops the dictionary early or stores the stream beyond it must be changed. github.com
• Signature changed zstd::Decoder::finish
  Was fn finish(self) -> R; now fn finish(mut self) -> R. crates.io
• Signature changed zstd::Decoder::with_prepared_dictionary
  Was fn with_prepared_dictionary<'b>(reader: R, dictionary: &DecoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,; now fn with_prepared_dictionary<'b>(reader: R, dictionary: &'a DecoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,. crates.io
• Signature changed zstd::Encoder::with_prepared_dictionary
  Was fn with_prepared_dictionary<'b>(writer: W, dictionary: &EncoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,; now fn with_prepared_dictionary<'b>(writer: W, dictionary: &'a EncoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,. crates.io
• Signature changed zstd::stream::Decoder::finish
  Was fn finish(self) -> R; now fn finish(mut self) -> R. crates.io
• Signature changed zstd::stream::Decoder::with_prepared_dictionary
  Was fn with_prepared_dictionary<'b>(reader: R, dictionary: &DecoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,; now fn with_prepared_dictionary<'b>(reader: R, dictionary: &'a DecoderDictionary<'b>) -> io::Result<Self> where 'b: 'a,. crates.io

And 8 more in this version.

Check your code

These are the changes. To see which of them reach your code, scan a public repository, or have your coding agent call check_code with your manifest or lockfile over MCP. The API reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys.