Odin Files

New Language Features

• Add @(fast_math) attribute (PR [#6676])
• Support ** as expand_values operator: **x == expand_values(x) (PR [#6731])

New Compiler Improvements

• Better error reporting for unary ++/-- (PR [#6649])
• Removed Haiku from supported targets (PR [#6631])
• Better SIMD generation for square matrix multiplication and intrinsics.transpose (PR [#6676])
• Fix deferred_return and segfault in docs writer (PR [#6668])
• Fix issue [#6429], odin doc handling of Fixed Capacity Dynamic Arrays in write_expr_to_string (PR [#6670])
• Add duplicates checking in type switches by @Creativty (PR [#6702])
• Fix nil typing for procedure call arguments (PR [#6701])
• Fix issue [#6096], honor -no-thread-local for variables declared at procedure scope (PR [#6696])
• Improve simd.runtime_swizzle and its documentation (PR [#6712])
• Improve thoroughness of generic procedure type detection (PR [#6711])
• Fix race condition relating to type specialization (PR [#6716])
• Fix issue 6692, using on bit fields (PR [#6742])
• Fix error pos style environment variable overwriting commandline argument (PR [#6741])
• Properly check #any_int param operands (PR [#6740])
• Fix assertion failure when comparing array-backed bit_fields (PR [#6773])
• Disallow * and / for bit_sets (PR [#6777])
• AArch64 assembly support for foreign import (PR [#6784])
• Fix error message "do not on the same line as for" (PR [#6794])

New Packages

• Add ML-KEM (FIPS 203) post-quantum key encapsulation support (PR [#6635])
• Add ML-DSA (FIPS 204) post-quantum digital signature support (PR [#6695])
• Add intial PEM support (PR [#6755])

Package Improvements

• Improve consistency between platforms for os.copy_directory_all (PR [#6651])
• Use context.assertion_failure_proc in tracking allocator bad free callback (PR [#6659])
• Add DefSubclassProc binding (PR [#6664])
• Make make_aligned and new_aligned builtins (PR [#6677])
• Handle invalid utf8 when parsing json (PR [#6669])
• Fix xlib binding signatures (PR [#6680])
• Add unicode mapping between 'ẞ' <-> 'ß' (PR [#6672])
• Fix missing only_if_exists parameter in x11.XInternAtoms (PR [#6684])
• Convert (f)stat calls to statx in Linux core:os implementation (PR [#6683])
• Additional xlib binding changes (PR [#6687])
• Fix read_slice typo in core:io/utils (PR [#6697])
• Document strconv.parse_int and strconv.parse_uint (PR [#6706])
• core:math/linalg: Add Gram-Schmidt orthonormalize (PR [#6707])
• vendor:wgpu: Fix incorrect proc signatures (PR [#6661], PR [#6724])
• Add support to unmarshal the new fixed capacity dynamic arrays (PR [#6713])
• core:encoding/base64: Misc fixes and improvements (PR [#6733])
• core:strconv: Fix upper bound of Decimal in round_shortest (PR [#6734])
• vendor:directx/d3d12: Add IDevice10 interface (PR [#6602])
• vendor/README.md fix inverted SDL2 and SDL3 (PR [#6749])
• Swap panic_contextless and unimplemented_contexless documentation (PR [#6758])
• core:sys/linux: Remove parapoly from rt_sigaction (PR [#6756])
• core:slice: Fix rotate_left crash on empty array (PR [#6771])
• core:sys.info: Prefer mem info from /proc/meminfo over sysinfo() (PR [#6765])
• core:mem / core:testing: Fix buffer overflow when running a test which shrinks a dynamic array (PR [#6791])

Miscellaneous

• Add /src as safe directory for nightly linux arm workflow (PR [#6658])
• Link against libstdc++exp for backtrace support (PR [#6732])

Full Change Log

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2026-05...dev-2026-06