Odin Files

New Language Features

• Allow custom -collections to be used for foreign imports in [#6999]

New Compiler Improvements

• Disallow proc group assignment to blank identifier in [#6996]
• Increase stack size for threads in [#6997]
• Reject chained deferred procedures in [#7013]
• Fix arm64 ABI: '#simd' vectors and vector aggregates not passed in registers (#7010) by in [#7015]
• Fix darwin arm64 argument passing abi in [#7030]
• Fix playdate -subtarget issue where floats were incorrectly compiled in [#7026]
• Make object and assembly file extensions user-changeable again in [#7041]
• Fix subtype comparisons (#6151, [#3689], [#7020] and [#4734]) in [#7039]
• Fix constant aggregate rebuild in [#7046]
• Keep polymorphic probes read-only in [#7052]
• Fix switch fallthrough in lb_emit_struct_ev (#7050) in [#7051]
• Fix arm64 argument alignment abi for composite type of size <= 16 bytes in [#7045]
• Preserve recursive struct aliases in [#7042]
• Compare mmap result to MAP_FAILED rather than nullptr (#7053) in [#7065]
• Stricter type coercions in convert_to_typed in [#7056]
• Fix backend deadlock where func_raw_types_mutex and types_mutex were waiting on each other by in [#7060]
• Add typeid constant case to check_comparison (#7027) in [#7064]
• Fixes compile time equality comparison for string16 in [#7071]
• Allow fixed-capacity arrays in constant unions (#7089) in [#7090]
• Fixes spurious #no_alias compile errors during polymorphic overload resolution in [#7116]
• Reject the use of labels as expressions (#5830 and [#7108]) in [#7130]
• Fix hang for poly procs with default proc literal params in [#7146]
• Fix expand_values panic on type expressions in [#7157]
• Handle spaces in args for 'odin run . -- <args>' on Windows in [#7162]
• Don't assert on -define: values with an exponent in [#7164]
• Fix error hint for vet tag in [#7132]
• RISC-V fixes/improvements in [#7144]
• Fix LLVM codegen for matching on nil for union{} in [#7139]
• Allow #caller_expression on constant parameters which are procedures in [#7119]
• Fixes compile error due to #no_alias shifting position in procs with indirect return in [#7214]
• Fixes a compiler segfault with zero sized parameters on targets that ignore these in the LLVM signature in [#7215]
• Fix every named argument in "Given argument types" being labelled with the first argument's name in [#7217]
• Fix levenstein_distance in [#7218]
• Fix signed Int Constants being permitted to exceed size in [#7220]
• Fix string16 oob in [#7221]
• Fix new line suppression by @kalsprite in [#7222]
• Improve grammar on import name error in [#7223]
• Fix matrix col error message that said rows instead in [#7224]
• Minor typos in [#7225]
• Fix crash on poly in [#7226]
• Fix -vet-packages not working in certain cases in [#7210]
• Pack tuple results into variadic arguments (#7167) in [#7185]
• Polymorphic procedures resolving to nil (#6753 and #) in [#7208]

New Packages

• [core:crypto/rsa] Add RSA support in [#6857]
• [core:encoding/asn1] Add strict DER + [core:crypto/x509] (X.509 v3) in [#6838]
• [core:crypto/turboshake] Add TurboSHAKE in [#7043]
• [core:rexcode] Add rexcode, a high-performance multi-architecture instruction encoder/decoder/printer package in [#6839]
• [core:debug/trace] Replaced with a much improved implementation in [#7141]

Package Improvements

• [core:container/rbtree] Match find_or_insert semantics with AVL in [#6988]
• [core:container/rbtree] Add upsert in [#7002]
• [vendor:box3d] Fix missing return value of *_GetUserData functions in [#7006]
• [core:sys/windows] Add additional bindings in [#7022]
• [vendor:raylib] Update rlgl bindings to raylib 6 in [#7023] and [#7028]
• [core:strings] Add @(require_results) where useful in [#7038]
• [core:log] Make multi logger use all loggers instead of breaking on first non match in [#7057]
• [core:encoding/csv] Update example to use the new core:os in [#7076]
• [base:runtime] Fix markdown table in docs in [#7077]
• [base:runtime] Fix map reporting incorrect capacity after shrinking in [#7097]
• [core:os] Fixes file open emulation of posix open behavior on mode/perm mismatch on Windows in [#7098]
• [base:runtime] Fixes SoA dynamic arrays not zeroing all elements after shrink + grow in [#7103]
• [core:odin/tokenizer] Set token kind to float for hex floats in [#7117]
• [vendor:sdl3] Fix (S/G)etDefaultTextureScaleMode in [#7133]
• [core:unicode] Fix duplicated entries within unicode_spaces and space_ranges in [#7142]
• [base:runtime] Fixes growth check for SoA dynamic arrays in [#7145]
• [core:debug/trace] Sync tracking allocator with core:mem in [#7147]
• [core:debug/trace] Sync allocator with core:mem in [#7200]
• [core:sys/windows] Fix LoadLibraryEx_Flags off-by-one in [#7151]
• [core:mem/virtual] Close dangling handle in map implementation on Windows in [#7159]
• [core:testing] Respect TERM=dumb in test runner to prevent ANSI sequences, color in [#7160]
• [core:thread] Add get_name and set_name in [#5464]
• [base:runtime] Shrink map to minimum capacity with shrink in [#7152]
• [core:text/scanner] Fix [#7153] and add a test in [#7165]
• [core:rexcode/x86] Label addressing for RIP-relative disp and movabs imm in [#7168]
• [core:simd/arm] Implement simd arm crc32 in [#7174]
• [core:compress/gzip] Fix example code in [#7178]
• [core:simd/arm] Implement simd arm pmull in [#7184]
• [base:runtime] Follow up fix of shrink_map [#7182]
• [core:odin/parser] Correct end position for fields with a specialization in [#7180]
• [core:text/scanner] Fix octal escape parsing in [#7176]
• [core:os] Update stale os.flags file doc in [#7187]
• [core:mem] Zero tracking_allocator.allocation_map and tracking_allocator.bad_free_array in destroy in [#7195]
• [base:runtime] Make soa builtins go vroom in [#7196]
• [base:runtime] Cleans up obsolete comments in _append_soa_elems in [#7204]
• [base:runtime] Annotates the array parameter of dynamic array builtins with #no_alias in [#7149]
• [core:simd/arm] Impl fix simd arm SHA in [#7205]
• [core:os] Fix glob not cloning pattern when no meta characters present in [#7206]
• [core:crypto/_fiat] Fix conditional in ensure in [#7211]
• [vendor:box3d] Update box3d (#7177) to https://github.com/erincatto/box3d/commit/3fc20f5b453ba9e14cdf54ecafa87a2a4bcdf53c in [#7212] + [#7231]
• [core:crypto] Minor fixes in [#7228]
• [core:os] Resolve relative path before SHFileOperationW in _remove_all in [#7230]
• [core:net] Fix percent encoding for bytes < 0x10 (#7109) in [#7234]

• [core:simd/arm] Implement simd arm neon bit manipulation in [#7216]

• Various typo fixes across the packages

Miscellaneous

• [vendor:*] Replace makefiles in with shell scripts in [#7034]
• CI: Update NetBSD to 10_2026Q1 in [#7085]
• Improve build scripts portabability and make them pwd independent in [#7084]
• CI: Make NetBSD CI less prone to breaking when scheduled on old CPUs

What's Changed

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2026-07a...dev-2026-08