Odin Files

New Language Features

• Native Array Casting Semantics, e.g. cast([4]f32)4x_u32 (PR [#6605])
• Increase matrix limit from 16 to 64 elements, allowing for up to matrix[8, 8]T

New Compiler Improvements

• Add -debug default behavior usage docs (PR [#6511])
• Fix output of filename when outputting docs with the -in-source-order option (PR [#6536])
• Fix #no_bounds_check regression (PR [#6541])
• Fix target feature lookup, canonicalize target_features_set (PR [#6544])
• Fix (Issue [#6344]) - Field-first index writes on #soa[dynamic]T and #soa[]T (PR [#6539])
• Fix aligned_alloc not defined on Android/Bionic (PR [#6519])
• Fix break/continue being allowed in a nested unrolled range loop (PR [#6521])
• SROA and simplification passes on -o:minimal (PR [#6553])
• Fix array counts for floats that are exactly representable as integers e.g. [1.1e4]int (PR [#6583])
• Prevent coredump when child process gets killed by signal (PR [#6586])
• Support multiple return values within compound literal elements (PR [#6596])
• Fix (Issue [#5422]) - Make @(rodata) on constants yield "not supported" message (PR [#6601])
• Fix (Issue [#6594]) - Report cycle when assigning variable to itself (PR [#6599])
• Fix (Issue [#6621]) - Report cycle for type_of (PR [#6624])
• Removed moribund Essence OS from supported targets (PR [#6623])
• Add intrinsics.c_va_* (PR [#6629])
• Fix type info not being generated for types only used in []typeid literals (PR [#6630])
• Fix compiler warning on Linux (PR [#6638])

New Packages

• [core:crypto/noise] Add Noise implementation (PR [#6573])

Package Improvements

• [core:os] Add dir procedure (PR [#6517], PR [#6528])
• [base:runtime] Native simd width (PR [#6545])
• [core:os] Fix _volume_name_len to handle paths of purely path separators (PR [#6547])
• [core:math/linalg] Faster dot, cross3, floor, ceil, and add trunc (PR [#6549])
• [core:math/linalg] More matrix related calls: pseudo_inverse, inverse_lu_decomposition, matrix_inverse_gauss_jordan
• [core:mem/virtual] Fix arena overcommit bug (PR [#6552])
• [core:sys/linux] Fix missing argument in adjtimex syscall (PR [#6502])
• [vendor:wgpu] Update to v29.0.0.0 (PR [#6551])
• [core:sys/freebsd] Add ioctl and stdio FILENO constants (PR [#6537])
• [core:nbio] Handle EOF in poll on Posix (PR [#6556])
• [core:container/xar] Fix a typo in example (PR [#6559])
• [core:testing] Ensure make_* style bounds traps are handled in test runner expect_signal on Windows (PR [#6563])
• [core:sys/windows] Add I/O Ring API bindings (PR [#6562])
• [vendor:directx/d3d12] Fix D3D12_BARRIER_SUBRESOURCE_RANGE struct (PR [#6557])
• [core:testing] Fix stop reason being wrong for OOB on Windows (PR [#6570])
• [core:fmt] Remove redundant 'defer bufio.writer_flush' from fprint procs (PR [#6567])
• [vendor:zlib] Fix signature of inflateInit_ (PR [#6566])
• [vendor:sdl3] Mixer: Removed #by_ptr from args that are valid as nil (PR [#6576])
• [core:mem/virtual] Fix map_file usage example (PR [#6577])
• [core:mem/virtual] Add address_hint to reserve (PR [#6558])
• [core:os] Fix stem on empty path (PR [#6579])
• [core:path/filepath] Create wrappers for allocating procedures (PR [#6575])
• [core:fmt] Omit value when formatting map[T]struct{} sets (PR [#6581])
• [vendor:vulkan] Add version macros (PR [#6565])
• [core:sys/windows] Add Registry Association API (PR [#6525])
• [core:sys/windows] Fix LockFileEx and UnlockFileEx (PR [#6625])
• [core:math/linalg] Fix negated quaternions in angle_from_quaternion (PR [#6607])
• [core:sys/linux] Emulate dup2 better on arm64 and riscv (PR [#6632])

Full Change Log

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2026-04...dev-2026-05