Issues

Btrees with fixed page sizes instead of fixed degrees

vlang/v#31093 · opened

on Oct 24, 2026

missing safe/fast modular arithmetic operations

vlang/v#31082 · opened

on Oct 24, 2026

v3: tests of compiler modules never use the module cache

vlang/v#31070 · opened

on Oct 23, 2026

Windows: C objects are never cached (CRLF in `cc -M` output fails the dependency scan)

vlang/v#31064 · opened

on Oct 23, 2026

Windows: a successful build that restarts is compiled twice (the parent's fallback marker is left behind)

vlang/v#31063 · opened

on Oct 23, 2026

Windows bootstrap broken: V revisions from Feb 2024 onward fail winos-test bootstrap (S_IFMT undeclared, bits.v parse error, conflicting types for v_os_exec_capture_start)

vlang/v#31060 · opened

on Oct 23, 2026

Integer literal combined with an `f64` alias yields `int` and silently drops the fraction

vlang/v#31052 · opened

on Oct 23, 2026

`compress.deflate` crashes in `compress_raw`: its constant tables are initialized in the wrong order

vlang/v#31039 · opened

on Oct 22, 2026

cannot name enum member `in`

vlang/v#31037 · opened

on Oct 22, 2026

V coreutils `ls` fails to compile on latest V

vlang/v#31035 · opened

on Oct 22, 2026

master (v3 cgen), Windows: module-main functions named `near`, `far`, `pascal` or `cdecl` collide with windef.h / minwindef.h macros (0.5.2 emitted `main__near`)

vlang/v#31030 · opened

on Oct 22, 2026

[v3] `-cc tcc` build takes 17s while the TCC stage itself takes only 0.23s

vlang/v#31027 · opened

on Oct 22, 2026

modules.vlang.io stale since 4 October 2026; recent module docs CI runs fail at Build V

vlang/v#30834 · opened

on Oct 18, 2026

-autofree: toml still emits undeclared replacement cleanup on 514bbdf (incomplete #30631 fix)

vlang/v#30804 · opened

on Oct 18, 2026

A program importing both gg and a module that vendors stb_truetype does not build

vlang/v#30615 · opened

on Oct 15, 2026

1

stdlib parity wave 2: API-level gap tracking

vlang/v#30492 · opened

on Oct 14, 2026

1

v3: `a << x` copies in depth the arrays inside the struct `x`, while `[x]`, `a << [x]` and the stable compiler share them

vlang/v#30463 · opened

on Oct 14, 2026

v3, json2: residual per-struct cost after #29364 — ~57 ms of `monomorphize` and ~21 KB of C per struct (200 structs → 12.3 s)

vlang/v#29819 · opened

on Oct 9, 2026

v3, veb: route dispatch is monomorphized per controller — 16 controllers × 8 routes → 42k generated C lines, ~0.11 s monomorphize per controller

vlang/v#29818 · opened

on Oct 9, 2026

v3, orm: per-model monomorphization costs ~0.19 s and ~120 KB of C (47 models with one `select` each → 8.9 s in `monomorphize`)

vlang/v#29817 · opened

on Oct 9, 2026

macOS 27 arm64: bundled TCC links binaries with garbage in __bss (v up hangs, make panics)

vlang/v#29744 · opened

on Oct 6, 2026

2

-d ownership cannot compile cmd/v: ~28 GB arena, trips the 9984 MiB guard

vlang/v#29496 · opened

on Oct 5, 2026

2

comptime: evaluate `@[comptime]` calls in `const` initializers and emit the value as static data; today every such const is computed in `_vinit`, and enum values ignore the result's integer width

vlang/v#29393 · opened

on Oct 3, 2026

vpm: version ranges in v.mod, a resolver, and v why

vlang/v#29360 · opened

on Oct 3, 2026

5

V fails to build with GC enabled on 32-bit powerpc: `v2(48980,0xf0403000) malloc: *** mmap(size=16777216) failed (error code=12)`

vlang/v#28612 · opened

on Sep 14, 2026

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Issues

Btrees with fixed page sizes instead of fixed degrees

missing safe/fast modular arithmetic operations

v3: tests of compiler modules never use the module cache

Windows: C objects are never cached (CRLF in `cc -M` output fails the dependency scan)

Windows: a successful build that restarts is compiled twice (the parent's fallback marker is left behind)

Windows bootstrap broken: V revisions from Feb 2024 onward fail winos-test bootstrap (S_IFMT undeclared, bits.v parse error, conflicting types for v_os_exec_capture_start)

Integer literal combined with an `f64` alias yields `int` and silently drops the fraction

`compress.deflate` crashes in `compress_raw`: its constant tables are initialized in the wrong order

cannot name enum member `in`

V coreutils `ls` fails to compile on latest V

master (v3 cgen), Windows: module-main functions named `near`, `far`, `pascal` or `cdecl` collide with windef.h / minwindef.h macros (0.5.2 emitted `main__near`)

[v3] `-cc tcc` build takes 17s while the TCC stage itself takes only 0.23s

modules.vlang.io stale since 4 October 2026; recent module docs CI runs fail at Build V

-autofree: toml still emits undeclared replacement cleanup on 514bbdf (incomplete #30631 fix)

A program importing both gg and a module that vendors stb_truetype does not build

stdlib parity wave 2: API-level gap tracking

v3: `a << x` copies in depth the arrays inside the struct `x`, while `[x]`, `a << [x]` and the stable compiler share them

v3, json2: residual per-struct cost after #29364 — ~57 ms of `monomorphize` and ~21 KB of C per struct (200 structs → 12.3 s)

v3, veb: route dispatch is monomorphized per controller — 16 controllers × 8 routes → 42k generated C lines, ~0.11 s monomorphize per controller

v3, orm: per-model monomorphization costs ~0.19 s and ~120 KB of C (47 models with one `select` each → 8.9 s in `monomorphize`)

macOS 27 arm64: bundled TCC links binaries with garbage in __bss (v up hangs, make panics)

-d ownership cannot compile cmd/v: ~28 GB arena, trips the 9984 MiB guard

comptime: evaluate `@[comptime]` calls in `const` initializers and emit the value as static data; today every such const is computed in `_vinit`, and enum values ignore the result's integer width

vpm: version ranges in v.mod, a resolver, and v why

V fails to build with GC enabled on 32-bit powerpc: `v2(48980,0xf0403000) malloc: *** mmap(size=16777216) failed (error code=12)`