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+---
+layout: post
+title: Released Cyclone Scheme 0.11.4
+excerpt: Significant speedup for mutable operations as well as many critical bug fixes.
+---
+
+Bug Fixes
+
+- Modified the minor GC write barrier to only track mutations where a heap variable is modified to point to an object on the stack. This significantly improves performance of mutation operations: `set!`, `set-car!`, etc.
+- Fixed an issue with `make-string` and UTF-8 chars. Thanks to Lassi Kortela for the bug report!
+- Added `open-binary-input-file` and `open-binary-output-file` from R7RS.
+- Validate the number of arguments passed to `if` expressions.
+- Raise a useful error instead of aborting the whole program (!) when apply attempts to execute an object of the wrong type.
+- Better handling of edge cases where an object of the wrong type is executed instead of a closure. Previously there were cases where this would cause the runtime to crash.
+