V 0.5.0

31 Dec 2025

Improvements in the language

• Add comptime if is shared support (fix #25600) (#25602)
• Make defer{} scoped by default, use defer(fn){} to get the old behavior #25639) (#25665)
• Add gotodef support for nested struct members, fn return types, etc (#26131)
• Add a new v.comptime stage COMPTIME, that runs after the checker (CHECK), and before the transformer (TRANSFORM), to simplify the work that later stages do #26068 (#26161)

Checker improvements/fixes

• Correctly detect variadic arg passed to struct fn (fix #25504) (#25509)
• Fix $(field.name) access on closure fn (fix #25513) (#25514)
• vls: skip unrelated files (#25531)
• Fix mutability in for in loops with pointer values (fix #25520) (#25536)
• Fix type inference, when pushing an empty array to a 2D array (fix #23854) (#25508)
• Prevent array.insert for array of references when non-reference is passed (fix #25511) (#25557)
• Add more support for mod autocomplete, allow for .vv files too (#25562)
• Fix cast from an empty struct to option (fix #25566) (#25581)
• Ensure ?Struct is not parsed as ??Struct when param is ?T (fix #25559) (#25564)
• Fix if branch type nr_muls mismatch (fix #25556) (fix #25555) (#25571)
• Fix comptime else branch handling (fix #25586) (#25589)
• Smart detect or {} inside loop when using c <-val (fix #24550) (#25435)
• Vls fix goto definition (#25595)
• Fix generic resolve for external module generic static method call (fix #21476) (#25634)
• Correctly detect type, when prepending to generic array (fix #25585) (#25645)
• Allow cast from voidptr to sumtype in unsafe block (fix #25652) (#25657)
• Disallow calls to a shared receiver method, on a non-shared var (fix #25577) (#25656)
• Fix or block endwiths expr (fix #25329) (#25667)
• Set ast file fallbacks for vls (fix #25678) (#25679)
• Error/warn when using defer(fn) inside function-scope and lock stmts (#25681)
• Maintain correct ref level in generic fn (fix #25676) (#25687)
• In vls mode, make ensure_type_exists return true (#25695)
• Only collect/hoist inner vars, when defer is function-scoped (#25693)
• Improve type checking for sumtypes with generics (fix #25690) (#25699)
• Unwrap for base type if ft.typ and inferred_typ are both opt (fix #25517) (#25728)
• Disallow deference of nil (fix #25740) (#25746)
• Fix comptime main fn (#25747)
• Parser,fmt,checker: use a trie for matching the generic array methods all, any, count, filter, map, sort and sorted (#25759)
• Fix array fixed unresolved return check and resolver (fix #25774) (#25790)
• Allow explicit sumtype to option casts (fix #25796) (#25812)
• Fix possible race on expected arg types unwrapping on cgen (#25815)
• Skip init check for options (fix #25798) (#25830)
• Fix module var set at change_current_file() (fix #25845) (#25846)
• Improve handling of array decompose for dynamic arrays and array init (fix #25838) (#25843)
• Force all fn declarations to follow after all other top level statements (fix #25889) (#25890)
• Fix used features tracking when printing pointer values (fix #25899) (#25901)
• Match type when auto deref occurs (fix #25913) (#25916)
• Relax the redundant () check to a notice, to enable a future v -W test vlib/builtin job on the CI
• remove () from match branch exprs (fix #25950) (#25952)
• Fix array map anon fn return fixed array (fix #25928) (#25977)
• Cleanup the output of v new --web abcd after feedback from https://youtu.be/IuE6Bo1klK0?t=555
• Allow assign to a shared int var (fix #25986) (#25988)
• Ensure type of global exists (fix #25910) (#25998)
• Ensure fn pointer cannot be used as non-fn argument (fix #26017) (#26022)
• Make sure $for eval body statements at least once to set types and avoid markused issues later (fix #26058) (#26063)
• Fix return static method name (fix #26105) (#26110)
• Support gotodef for struct init and sumtype rhs (#26157)
• Detect circular type references in sumtype declarations (fix #24511) (#26162)
• Add interface type handling and new testcase (fix #24116) (#26165)
• Allow enum fields to reference previously declared fields (fix #25241) (#26173)
• Clear all ref from autostr receiver_type (needed by #25857) (#26202)
• Allow for _ being used as both import x as _ and fn f(_ int) { (fix (#26219) #26230

Parser improvements

• Fix vls mode strut mut keyword (fix #25548) (#25551)
• Fix vfmt comment in struct init after the update expr (fix #24361) (#25668)
• Fix infix expr comment in middle (fix #24183) (#25671)
• Disallow using generic functions as a field type name inside struct decl (fix #25452) (#25705)
• Warn on @[deprecated_after] used without a corresponding @[deprecated] attribute (#25712)
• Fix last stmt is fn call in or_expr (fix #25732) (#25739)
• Allow for |mut x, y|expr (fix #25734) (#25735)
• Allow using a, b and it as var names, when using the builtin array methods (fix #25729) (#25755)
• Disallow generic function to be exported (fix #25794) (#25806)
• Support -d trace_parse to ease diagnosing problems related to the order of parsing of .v files in modules
• Fix the language support for a nested anonymous C.struct (fix #25807) (#25789)
• Disallow untyped chan used as a fn parameter type (fix #25818) (#25854)
• Improve the unused import warning message (add fixing alternatives) (#25880)
• checker,parser,ast: make type MyBuilder = strings.Builder work (part 1); add mod fields to ast.SumTypeDecl and ast.AliasTypeDecl (#25943)
• Remove dead code in Parser.is_array_type/0 (#26080)
• Check invalid struct name in struct_init() (fix #26030) (#26093)
• Remove the support for the obsolete generic fn call syntax f() (first deprecated in 2022/11) (#26126)
• Fix comptime for lock shared field (fix #26143) (#26146)
• checker,parser: add multifile gotodef support for -line-info (#26167)
• Optmize Parser.call_kind (#26196)

Compiler internals

• markused: fix markused struct heap (#25542)
• markused: fix array.prepend C code dependency (fix #25573) (#25582)
• markused: fix fn marked as used when variable and fn uses same name (fix #25649) (#25650)
• checker,transformer: add always true/false branch detection for the if and match constructs (#25674)
• v.util: measure more precisely how long a new tool recompilation lasts in launch_tool, when using v -d trace_launch_tool self
• transformer: fix struct init comparison turning into boolean (#25724)
• v.builder: support V_NO_RM_CLEANUP_FILES=1, to ease debugging of -usecache issues
• v.builder: make it easier to reproduce the exact specific stages of -usecache module compilation by logging the full CLI options for each
• v.builder: fix .vsh mode doing an implicit import os, now only for .vsh file itself (fix issue spotted in #25736) (#25745)
• v.builder: improve diagnostic information for a failed build_thirdparty_obj_file
• transformer: transform ArrayInit into a function call for C and native backends (part 1)
• builder,pref: add -file-list support (implement feature #25707) (#25749)
• pref: for -usecache, set .parallel_cc = false and .no_parallel = true to make compilations more deterministic and ease CI diagnostics
• markused: fix missing builtin__memdup definition, when an option struct field is used (fix #25801) (#25802)
• transformer: move array logic to array.v
• v.builder: improve the error message for failing cgen; suggest -g and -show-c-output
• v.pref: fix GitHub download URL for the photonwrapper .so file (fix #25708) (#25831)
• v.pref: use v download for downloading the prebuilt photonwrapper shared library (#25849)
• markused: fix const as fn mark as used (fix #25888) (#25895)
• transformer: disable generic str_intp opt (fix #25896) (#25897)
• v.scanner: remove obsolete .is_crlf and .is_vh fields (#25918)
• v.scanner: use a named return for decode_XXX_escape_single methods, to reduce the generated C diff churn, during scanner code updates
• markused: add new auto_str() used funcs for bootstrap (#25938)
• v.builder: provide more detailed error message, on msvc: failed to build a thirdparty object, not just the failed command
• v.builder: improve formatting of the failed to build a thirdparty object message for msvc
• scanner: remove old generic check logic (fix #25959) (#25997)
• transformer: fix the setting of a generic flag for fixed array type with -new-transformer (#26009)
• transformer: add file/line info for fn with expand_simple_interpolation (#26135)
• transformer: add early return to avoid transform getting applied twice for a for x < y { body (#26153)
• markused: fix option none markused (fix #26147) (#26151)
• v.builder: enable gc back with msvc, build separate .debug.obj thirdparty files when -g is passed, to prevent linking issues (#26215)
• v.builder: support compiling asm .S files to .o files, mentioned in #flag directives (needed for #26185) (#26211)
• v.builder: fix compile asm file, followup of PR #26211 (#26227)

Standard library

• arrays: fix rotate_left() and rotate_right(), add test (#25539)
• encoding.base58: fix encoding, add test (#25538)
• x.crypto.chacha20poly1305: move up responsibility for allocs into higher caller (#25574)
• crypto.cipher: fix decryption in CBC mode, add test (#25584)
• os: use @[noinline] on os.create/1 to workaround a -cc gcc -prod panic (fix #25549)
• time: fix non-digit checks for parse_rfc3339() (#25597)
• gg: add explicit bounds checking for image caching methods in gg (fix #25590) (#25591)
• time: fix quarter calculation in custom_format() (#25608)
• rand: fix randomness in shuffle() (#25617)
• gg: destroy unused GPU resources before replacing cached images (#25615)
• encoding.binary: fix serialize skip struct shared fields (related to issue #25600) (#25613)
• x.crypto.chacha20poly1305: make implementation use fixed sized arrays more (#25627)
• builtin: make result string end with null in u8(x).repeat(y) (fix regression after #22100) (#25625)
• gg: fix address of const warnings for v -experimental program_using_gg.v
• builtin: add .hex() methods to the rune and char types too (#25635)
• datatypes: fix insert() and delete() for items in second half of DoubleLinkedList[T]{}, add test (#25647)
• builtin: use an explicit loop to determine min_common_indent in string.trim_indent/0 to reduce allocations and reduce the reasons for misfires of the closure detection heuristic
• vlib: use defer(fn) { syntax where appropriate (part 2 of #25639) (#25653)
• x.json2: fix decode_number not initializing value to zero (fix #25641) (#25675)
• crypto.hmac: optimize hmac.new, support calculations with a blocksize > 256 (#25686)
• math.unsigned: fix put_bytes(), add test (#25718)
• builtin: reset .len and .cap to 0 too, in the array.free() method (#25717)
• os: add pipe and stdio_capture support (implement #25714) (#25716)
• encoding.utf8.validate: fix validation, add test (#25748)
• crypto.blake2b,crypto.blake2s: add @[direct_array_access] to hot functions (#25750)
• strconv: fix handling of subnormal numbers like '1.23e-308'.f64() (fix #25751) (#25752)
• crypto.sha3: remove import math (just for int_max), to improve compilation time and complexity for code that uses sha3
• builtin: add declarations for C.GetCurrentThreadId(), C.gettid() and C.pthread_self()
• builtin: add pid: and tid: fields to the panic reports (part 2 of #25808) (#25809)
• gg: add doc comments for the FN** types (#25814)
• rand: add missing i8() utility function (#25819)
• builtin: fix C.SYSTEM_INFO (fix #25788) (#25823)
• builtin: support -d no_getpid and -d no_gettid for systems that lack proper process management APIs
• math: fix vec2,3,4 project not using the right formulas (fix #25811) (#25813)
• math.vec: swap u and v in the .project() method of Vec2,Vec3,Vec4 (#25841)
• crypto.cipher: fix xor_key_stream() for OFB mode, add test (#25844)
• encoding.binary: use unions for small speed increase and readability (#25867)
• math.complex: replace == with eq_epsilon() in equals() (#25873)
• crypto.cipher: fix xor_key_stream() for CTR mode, add test vector created with OpenSSL (#25866)
• os: enhance os.cp() to mimic Python's shutil.copy2() (#25893)
• io.util: use correct TempDirOptions parameter type name in temp_dir() (#25904)
• builtin,sync: eliminate calls to _us32_lt in new_map/6, and in the spinloops in Channel.try_push_priv, Channel.try_pop (#25912)
• rand: restore error margin in dist_test.v back to 0.05 (the updated seeds were found by @tankf33er in #25907)
• builtin: reduce the max size of string representations of integers (#25919)
• builtin: remove commented code, improve comments
• x.crypto.chacha20: fix deprecation warning during compilation of Cipher.rekey/2
• math.easing: fix in_out_expo(), add test (#25944)
• builtin: split builtin.v and builtin.c.v into smaller, and more focused .v files, to ease working on unrelated subsystems (#25965)
• transformer: fix v -new-transformer vlib/strconv/atoi_test.v (#26021)
• gg: add more documentation for color substraction (fix #21549) (#26023)
• toml: fix for single \r occurence in multi-line """ strings (\r\n is still allowed) (#26029)
• toml: remove workarounds + TODOs for fixed issue #9507 (#26037)
• x.json2: fix decode_number for u8 (fix #26027) (#26033)
• rand.wyrand: switch to using the original C._wymix() as a performance optimisation (#26051)
• strconv: fix float scientific notation (fix #26045) (#26046)
• x.json2: fix decoding of float values in scientific notation (fix #26043) (fix #26062) (#26060)
• builtin: add a declaration for C.memchr too (#26054)
• toml: add compliance up until official toml-lang/toml-test@c6a78f1 (#26067)
• builtin: fix some C fn parameter types (#26069)
• toml: add compliance to official toml-lang/toml-test@8bb8d9c (#26070)
• toml: remove special cases for jq normalization (#26092)
• toml: fix remaining valid key/* exceptions (#26125)
• builtin: make string.index_ public, to simplify code using a redundant x := s.index(sub) or { -1 } pattern (#26123)
• builtin: add declarations for C.memmem and C.mempcpy (#26129)
• builtin: speed up, fix and test impl_utf8_to_utf32 (#26109)
• toml: fix remaining valid array/* exception (#26138)
• toml: fix unicode decoding panic on invalid TOML key/duplicate-keys-06.toml (#26140)
• toml: allow true and false as keys when parsing root table (#26144)
• toml: allow dotted key lengths > 2 within nested arrays of arrays (#26145)
• flag: fix v vet -W vlib/flag/ (fix remaining doc comments)
• x.json2: fix memory access error, when decoding string enum values (fix #26176) (fix #26179) (#26178)
• toml: fix invalid exception by erroring on duplicate keys in inline table (#26177)
• time: implement faster and simpler push_http_header (#26155)
• toml: fix remaining invalid exceptions for table/* (#26189)
• toml: reach 100% TOML v1.0.0 compliance with the official test suite (#26203)
• x.json2: remove workaround_cast(), add isize usize decode support (#26210)

Web

• net: fix cookie parsing when ; is used (fix #25544) (#25561)
• veb: new fasthttp module with -d new_veb (multithreaded, epoll/kqueue): makes veb multithreaded and fixes frequent hangs
• veb: fix gzip middleware decode/encode (fix #20865) (fix #25753) (#25754)
• veb: gzip support for StaticHandler (fix #20859) (#25758)
• veb: support markdown content negotiation, compliant with https://llmstxt.org/ (#25782)
• fasthttp: move kqueue related code to a separate file
• veb: add zstd compression support (#25816)
• veb: remove println('send_file ct=...') leftover (#25834)
• ci: reduce false positives for veb_should_listen_on_both_ipv4_and_ipv6_by_default_test.v by retrying it 3 times (since sometimes binding to the port it listens to fails)
• veb: add an early startup panic error message, when the result type of route handler methods is not veb.Result (fix #25970) (#25973)
• net.mbedtls: make errors more verbose, to ease remote diagnosis of issues
• net.openssl: make errors more verbose, to ease remote diagnosis of issues
• veb: improve the before_request documentation
• veb: add method.location too, to the invalid return type error, to ease diagnosing problems while prototyping
• wasm: fix const reference another const (fix #25722) (#26010)
• fasthttp: fixes and improvements (#25906)
• wasm: export pub fns in main module when targeting wasi (#26041)
• net.http: use error_with_code in download_file() (fix #26056) (#26057)
• net.http,veb: fix detection of the headers/body boundary in parse_request_head_str (fix #26091) (#26112)
• fasthttp: expand http request parser (related to #26091 part1) (#26104)
• net.ftp: fix get() command conversation, add test (fix #18858) (#26194)
• x.sessions: verify HMAC signatures when extracting sessions IDs from cookies (#26199)
• net.http: fix a panic in parse_multipart_form, for small/incomplete form data (fix #26204)
• net.http: support keep-alive connections in server (fix #26136) (#26218)

ORM

• Mark orm_where_in_test.v to be skipped in the sanitize-memory-clang job
• Fix fkey insert as assigment expr (fix #25568) (#25575)
• Fix double fkey insert and update (fix #25593) (#25606)
• Add index attr support (#25604)
• Fix autofree detection for is_or with block style (fix #25969) (#26089)
• Allow multiple set() in one update() call (fix #26116) (#26117)
• Add check for invalid index field name (#26142)
• Supoprt DISTINCT keyword (#26163)

Database drivers

• db.sqlite: fix orm f32 field retrieval for sqlite (fix #25583) (#25592)
• db.pg: support returning Result type with column names (#25737)
• db.sqlite: allow for mut db := sqlite.connect_full(":memory:", [.readwrite, .create, .fullmutex], "")! defaulting to unix/win32 depending on the platform
• db.pg: support LISTEN/NOTIFY (implement feature #23983) (#26133)
• db.pg: fix v check-md vlib/db/pg/README.md
• Revert "db.sqlite: support calling exec_param_many with [][]string or []string (it now accepts a sumtype of both) (#26100)"
• Reapply "db.sqlite: support calling exec_param_many with [][]string or []string (it now accepts a sumtype of both) (#26100)"

Native backend

• Fixed array, -new-transformer dynamic array (#25817)
• Add $if trace_native_todos ? { to reduce noise in v test-all

C backend

• Fix resolution type Map[string]T when T is AliasToMap (fix #25494) (#25510)
• Fix markused for option generic param (fix #25501) (#25525)
• Fix empty struct initializer for clang (fix #25467) (#25526)
• Fix match codegen for option match case (fix #25533) (#25537)
• Fix codegen for alias for array fixed initialization (fix #25512) (#25540)
• Ensure option none/ok state is also compared (#25532)
• Fix match codegen for option expr on case (fix #25545) (#25553)
• Add -no-closures option to detect closure usage earlier (for emscripten or for less well supported platforms) (#25565)
• Create ctemp before lockexpr gen (fix #25576) (#25612)
• Fix if expr with condition that requires temporary variable (fix #19584) (fix #23903) (#25621)
• Fix multi return of a fixed array (fix #25626) (#25628)
• Fix generic multiple indirections on print (fix #22793) (#25633)
• Fix fn (d Struct) a[T]() T { return d } when T is a sumtype (#25644)
• Minimize code generated for asserts (generate the common parts for the pass/fail case once) (#25642)
• Handle pointers in json map decode/encode (fix #25632) (#25646)
• Fix defer stmts with if exprs and or blocks that return a value (#25651)
• Fix infix expr ComptimeSelector type (fix #25659) (#25662)
• Fix passing sumtype child to generic function taking sumtype parent (fix #25660) (#25664)
• Fix multi generics fn name (fix #23886) (#25673)
• Fix defer generation within comptime $if/$match/$for (#25677)
• Fix codegen for if comptime and array fixed (fix #25691) (#25697)
• Correct function definitions for callbacks in imported modules (fix #25700) (#25719)
• Improve codegen for array fixed init for g++ compiler (fix #25723) (#25725)
• Fix codegen for operator overload method_name on alias to builtin types (fix #25709) (#25726)
• Fix missing cast if fixed array is surrounded in brackets (fix #25629) (#25741)
• Fix comptime for types not being recognized with maps correctly (fix #25742) (#25743)
• Fix dump(ptr_to_fixed_array_value) - it now returns the argument directly (thanks @tankf33der) (#25764)
• Cast member variables to correct types in comptime $for (fix #25771) (#25773)
• Include ast.ComptimeSelector in fixed array checks (fix #25767) (#25777)
• Checker,cgen,type_resolver: prevent stale type cast on comptime $for, handle in dumpexpr (fix #25781) (#25784)
• Reduce the nested expr level complexity of Gen.ident
• Fix tcc attribute, fix os.notify (followup to #25779) (#25804)
• Ensure array of string is not cloned with depth 0 (fix #25783) (#25793)
• Support -d trace_check and -d trace_cgen to help diagnose checker and cgen ordering issues
• Support -d trace_cgen_fn_decl and -d trace_cgen_gen_fn_decl too
• Show the v_gettid() hex with -d trace_cgen_fn_decl and -d trace_cgen_gen_fn_decl
• Use variadic_count == 1 when passing variadic to call of same array type (fix #25827) (#25837)
• Fix nested or in assign decl (fix #25864) (#25865)
• Fix variadic on translated (fix #25862) (#25876)
• Allow @[cinit] for const variables (#25881)
• Fallback to field type when default_expr_typ is 0 (fix #25891) (#25903)
• Fix map value init with array fixed const (fix #25887) (#25902)
• Fix cast type changed before last stmt in stmts_with_tmp_var (#25915)
• Update wyhash to version 4.2 (#25907)
• Use final_sym for elem_sym in index_of_array (fix #25960) (#25961)
• Fix variadic call on sumtype with array of itself (fix #25898) (#25964)
• Correct T{} init for []Type aliases (fix #25962) (#25963)
• Fix array init with fixed array from return call (fix #25954) (#25971)
• Fix fntype unwrap on ifguard (fix #25911) (#25914)
• Add a source .location field to $for method in Type.methods { (#25976)
• Fix iterator on alias to fn ptr (fix #25911) (#25978)
• Fix shared int string intp (fix #25984) (#25989)
• Allow init shared field with default value (fix #25990) (#25991)
• Allow init of struct from struct with array of optional values (fix #26000) (#26005)
• Fix default value in if/else or block (fix #26002) (#26020)
• Fix fnptr indirections declaration (fix #25940) (#25987)
• Fix bool cast from value (fix #26028) (#26031)
• Fix cast() generic type bug (fix #26065) (#26066)
• Fix fn_var_signature() support nr_muls (fix #26049) (#26075)
• Fix cast_expr() for alias (fix #26076) (#26079)
• Handle CallExpr in dumpexpr (fix #26084) (#26087)
• Clean code in return stmt (fix #25968) (#26118)
• Fix cast to array (fix #26099) (#26102)
• Fix fn_var_signature() allow option type (fix #26088) (#26120)
• Fix scoped struct array fixed generation (fix #26111) (#26114)
• Fix option array init with non option values (fix #26148) (#26170)
• Fix heap fixed array assign (fix #26149) (#26169)
• Fix stack overflow for @[heap] structs with large fixed arrays (fix #22690) (#26183)
• Fix print interface when arg0 is function call (fix #26184) (#26188)
• Checker,table,cgen: fix generic interface confusion (fix #25478) (#26181)

vfmt

• Force conversion of []Type{init: it} -> []Type{init: index} (#26201)

Tools

• ci: run v doc with VJOBS=1 on the CI, to make remote diagnosing of failures easier
• Remove unused sw := time.new_stopwatch() call
• Add support for VTEST_SHOW_CMD=1 in v test . too
• ci: use VJOBS=1 for the v test cmd/tools/vdoc step too, to ease diagnosing remote CI failures
• ci: bump cross-platform-actions/action from 0.29.0 to 0.30.0 (#25666)
• Fix showing the failed compilation output with v -silent test .
• ci: bump all timeout-minutes: 15 to timeout-minutes: 20 to reduce false positives due to network timeouts (mostly for the Termux job)
• Note about v help check-md when v check-md . fails
• ci: skip invalid_utf8_string.vv in compiler_errors_test.v for msvc
• ci: reduce annotation noise, remove dead code
• ci: skip the multistage v->v2->v3 -usecache checks for now (reduce false positives on the CI for unrelated PRs, until the root cause is fixed)
• ci: add new job sanitize-address-clang-without-gc that passes -gc none through VFLAGS (#25780)
• Support VTEST_SHOW_LONGEST_BY_RUNTIME=5 VTEST_SHOW_LONGEST_BY_COMPTIME=5 VTEST_SHOW_LONGEST_BY_TOTALTIME=5 v test .
• Print total time at the end of the v test-all output to ease visual comparisons in separate shells, without scrolling
• Use unbuffer_stdout in TestSession.test, to ensure consistent output on the CI jobs
• v.builder: remove the obsolete check for V_NO_C_ERROR_INFO (VQUIET=1 replaced it in 2023); add VQUIET to the -q description
• Make v search failures easier to diagnose (on the CI)
• Support v download -o some/folder/local.toml TOML_URL, in addition to --target-folder
• Add --sha3-256 support for checksumming the content that v download saves
• Add a watchdog timer in test_if_v_test_system_works.v to speedup the failure of stuck CI jobs
• Use local vtest build: tags to eliminate the need for the skip_fsanitize_too_slow list in vtest-self.v
• ci,vpm: make dependency_test.v more robust, and easier to diagnose remotely
• ci: set VTMP too in set_test_env/1, to avoid cloning conflicts during parallel test executions
• v.builder: do not produce If the code is in a folder with multiple .v files for temp V REPL files, to improve messages for 'asdas'.starts_wiz('xyz')
• Add a -new-transformer task to v test-all. Remove -skip-unused flags (it is the default for ~1 year).
• Improve development experience for v -W -silent test-self vlib (especially on CIs); always show compilation errors for failures
• Support VTEST_KEEP_SESSION=1 ./v test vlib/math
• vet: use new annotation syntax ([] -> @[]) (#26026)
• ci: bump cross-platform-actions/action from 0.31.0 to 0.32.0 (#26074)
• Make the is_sqlite3_present check more robust (work with the system packaged sqlite library again too)

Operating System support

• ci: fix gcc-windows -std=c99 (#25534)
• os: add windows stdin_write() support (#25546)
• ci: use macos-14 instead of macos-13 (the older runner is being deprecated) (#25670)
• v.builder: fix json-errors with a windows path separator (#25680)
• ci: fix unsetting of VFLAGS in v run ci/linux_ci.vsh v_self_compilation_usecache_clang
• ci: stop unsetting VFLAGS completely in ci/linux_ci.vsh and ci/macos_ci.vsh
• builtin,os: fix windows execute ANSI encoding result, make msvc error messages readable in a Chinese locale (fix #25727) (#25736)
• db.sqlite: update windows version to https://sqlite.org/2025/sqlite-amalgamation-3510000.zip (#25766)
• os.notify: fix struct epoll_event alignment on ARM64/Linux (fix #25778) (#25779)
• fasthttp: Linux/epoll support
• math: reduce the nested level of expressions, to reduce the chances of stack overflows on windows
• net.http,ci,db.sqlite: rewrite .github/workflows/windows-install-sqlite.bat in .vsh, fix vschannel on windows downloading content > 32KB (#25792)
• v.builder: bump the default stack size for executables, when compiling with msvc on windows, to 32MB (#25824)
• ci: reduce the chances of false positives due to hangs of use_net_and_net_unix_together_test.v on windows
• doc: add subsections about using SQLite on windows and about installing the self contained sqlite module.
• v.builder: switch to using -std=c99, instead of -std=gnu99 to avoid name colisions with C linux macros defined by gcc/clang (#25848)
• gg: set more sensible and user friendly defaults for the width, height and the title of new windows
• thirdparty: update thirdparty-openbsd-amd64_tcc.sh (#25945)
• ci: install plain gcc on the OpenBSD jobs
• ci: use gcc as the name of the compiler instead of egcc on OpenBSD
• ci: remove the gcc-openbsd job, until OpenBSD people fix their broken conventions on 7.8
• ci: run v -W -silent test-self vlib on linux, so deprecations/warnings introduced in PRs, can fail (and be fixed) earlier (#25955)
• ci: use VTEST_SHOW_LONGEST_BY_* vars on OpenBSD (#25958)
• ci: update to use FreeBSD version 15.0 (#25985)
• crypto.ecdsa: update to test and use OpenSSL 3.5 on OpenBSD (#25995)
• x.crypto.slhdsa: add support on OpenBSD using OpenSSL 3.5 (#25996)
• ci: reduce failure rate for the gcc-windows job, in test_if_v_test_system_works.v
• ci: skip use_net_and_net_unix_together_test.v on gcc-windows (many weird timeouts on unrelated PRs)
• db.sqlite: fix exec_param_many on linux for the case of a [][]string parameter
• v.util: add -d max_suggestions_limit=140 for v itself, to improve handling of large .v files with many thousands of lines on windows
• v.util: bump max_suggestions_limit to 200, to account for windows
• ci: extract windows_ci_msvc.yml from windows_ci.yml to enable finer grained workflow/job control
• ci: extract and split windows_ci_tcc.yml and windows_ci_gcc.yml from windows_ci.yml for improved job control

Examples

• Handle closing of the window in the event manager in examples/viewer (#25522)
• ci: add a report-wrong-examples-in-doc-comments job, that runs ./v doc -check-examples -f none vlib/ (#25554)
• Make reproduction of failed examples easier (make sure that all the checked sources have an ending \n)
• Use math.vec in path_tracing.v and in vyper.v
• Support v -d trace_execution run examples/brainvuck.v mandlebrot.bf
• ci: do not use -silent for the v build-examples task on windows, to make it easier to diagnose recent gcc-windows timeouts
• doc: add an example for reading from a non empty buffered channel, after closing it
• Fix and improve vanilla_http_server (#25905)
• ci: remove -silent from the macos build_examples task too, to make remote diagnosing of CI timeouts easier
• Add optional update_fn: fn (dt f32, ctx &gg.Context) to gg.Context and gg.Config . Pass consistently the current GG context to all callback functions, instead of nil.
• Add expanding_rect.v (modeled after the example from https://love2d.org/wiki/love), add generic helpers gg.frgb/3 gg.frgba/4
• tools,examples,veb: fix v -d trace_before_request run examples/veb/veb_example.v after feedback from https://youtu.be/IuE6Bo1klK0?t=2100
• Move flag/ .v files 1 level up, to prevent module lookup confusion for unrelated examples
• Add a Lorem Ipsum Generator (#26036)
• examples,net.ftp,v.builder: remove remaining matches of rg --multiline --multiline-dotall "continue\n\t+\}\n\t+\}\n\t+return" -B3 -A3
• Update lorem.v with a Markov algorithm for better text generation (#26085)
• fasthttp: fix the correctness of the minimal server example, when tested with curl (#26072)
• v.gen.native: fix v -os macos -experimental -b native -o hw.macos examples/hello_world.v on linux
• tutorials: remove newline in the example for c2v's cc compilation to doomv (#26200)
• Make all the labels fit in the default window size header in minesweeper.v