odin-lang/Odin dev-2026-01

on GitHub

New Language Features

New Compiler Improvements

• Undetected type declaration cycles work-around
• Fix misleading error messages for init, fini and test attributes
• Fix automatic objc_msgSend on static methods via selector expression not resolving aliased types
• Fix #packed #all_or_none
• Fix auto objc_msgSend incorrectly treating certain class methods as instance methods.
• Fix handling of #force_inline
• Fix literal endianness

New Packages

• core:container/xar, an Odin-native implementation of an Exponential Array

Package Improvements

• Fix duplicate jpeg.load on JS
• Added more NSApplication and NSWindow bindings
• Update kb_text_shape to v2.03
• Fix default temp allocator underflow bug
• SDL2: Use multi-pointer so you can pass array
• Fix function signature for memmove in vendor:libc
• Freebsd: Fixed 'write' syscall to cause 'ESPIPE' on the pipe fd
• Update Box2d to 3.1.1
• Fix core:debug/trace example
• Make linux.IO_Vec.base a multipointer
• Ensure libc is linked on Windows for vendor:compress/lz4
• Change Return Type of sdl2.GetWindowFlags from u32 to Existing WindowFlags bit_set
• Fix minor issues within curl bindings
• core:time/timezone added additional search paths to match musl
• More bindings for Darwin
• Add @builtin to missing builtin procedure group procs
• os/os2: fix stale errors on windows when reading from console
• os/os2: better fix for the stale errors
• Fix runtime.print_i64 using an OOB index when min(i64) is given.
• os/os2: use ReadFile for Console reads too, at least for now
• core:sys/linux Add timerfd syscall wrappers
• Fix nfds_t alias for Linux
• core:io/utils: fix buffer size in write_* procs
• core:net docs: recv of 0 bytes with no error is a graceful close
• core:math/rand small documentation fix
• Address issue identifying CDATA in XML file
• encoding/base32: Fix padding validation for malformed input
• Fix standard json parsing / unmarshalling issue for pure arrays
• Add user32 scroll bar related bindings, and FrameRect
• Add missing 'caller_location' to several procedures in 'slice' package
• Update letter.odin
• WebGL binding additions
• Add JSON5/SJSON Comments When Marshalling
• Fix Unicode Output When Marshalling JSON
• Allow Unmarshalling to rune
• Custom json (un)marshalling, similar to core:fmt's custom formatters
• Fix net.map_to_ip6 offset
• [vendor/sdl3] update to sdl 3.4.0

Other

• Fix NetBSD CI by @krnowak in #6080

Full Changelog: dev-2025-12a...dev-2026-01