Odin Files

New Language Features

*

New Compiler Improvements

• Improve type inferencing of literals when calling proc groups
• Windows i386 support
• Fix Darwin addObserver methods and add support for new Objc_Block
• Fix segfault involving string_to_string16 on Linux
• Improve OSX threading performance
• Basic support for constant union literals
• Add -para-poly-diagnostics
• Prevent returning a struct containing compound literal slice
• Relax signature_parameter_similar_enough on struct params and fix various foreign signatures
• Preempt field checking on signature_parameter_similar_enough with a type ptr equality check
• Remove stray debug printf

New Packages

• [core/image]: Add baseline JPEG support

Package Improvements

• Use .Image_Dimensions_Too_Large in core:image
• tick_now: Use f64 (was f32) as a return type of odin_env.tick_now()
• Allow missing trailing comma with proc groups in core:odin parser
• Fix incorrect json encoding for control characters < 32
• Initializing big.Int constants is now "contextless"
• Add CancelIoEx and other overlapped I/O functions.
• Add missing caller location param to append in strings.Builder
• Add "contextless" to small_array get_safe and get_ptr_safe
• Zero small_array resize
• Unify filepath.join return between Unix/Windows
• Fix out-of-band allocations in dynamic arenas by
• Fix for temp_file name prefix being deallocated before being used
• Add runtime.conditional_mem_zero to improve heap_allocator performance on non-Windows systems
• Add digit_to_int to core:strconv
• Remove inaccurate tprint comment

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2025-09...dev-2025-10