cyclone/_posts/2020-08-03-Released-Cyclone-Scheme-0.19.md
2020-08-02 18:20:00 -04:00

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---
layout: post
title: Released Cyclone Scheme 0.19
excerpt: This release improves error reporting and includes many bug fixes.
---
Features
- Improved error messages with filename and line numbers are now provided for a wide range of syntax errors.
- Added `c-void` type into `(cyclone foreign)`.
Bug Fixes
- Fixed a bug in the optimized numeric comparison operators when comparing a double with a bignum, that could lead to undefined behavior.
- Fixed `make_empty_bytevector` and `make_c_opaque` parameters on `(cyclone foreign)`.
- Avoid compilation errors when a program ends with a `set!` expression. Thanks to Yorick Hardy for the bug report!
- Fixed a bug with the interpreter such that running an `import` will no longer remove definitions from the global environment.
- Fixed another interpreter bug to allow `import` to load renamed identifiers.
- Prevent compiler errors when calling an anonymous lambda that accepts an optional argument list.