chore: upgrade to Zig 0.16.0#10
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wemeetagain merged 6 commits intoChainSafe:mainfrom Apr 20, 2026
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- std.ArrayList is now unmanaged by default; use .empty + explicit allocator - addCSourceFiles/addIncludePath moved from Compile to Module (lib.root_module) - Add zig-pkg/ to .gitignore (new local dep storage in 0.16) 🤖 Generated with AI assistance
1. build.zig: Use ArrayListUnmanaged instead of ArrayList - the managed ArrayList no longer has .empty in Zig 0.16. 2. build.zig.zon: Point to lodekeeper-z/hashtree fork which fixes macOS ARM64 assembly syntax. The upstream assembly files incorrectly mixed ELF (#:lo12:) and Mach-O (@PAGEOFF) relocation syntax, which newer clang (in Zig 0.16) rejects. 🤖 Generated with AI assistance
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Pull request overview
Updates this package to be compatible with Zig 0.16-dev (master) as part of the wider Zig master upgrade effort, primarily by adjusting build-system APIs and aligning dependency metadata/CI.
Changes:
- Update
hashtreedependency pin inbuild.zig.zon. - Migrate build script usage to newer build APIs (e.g.,
root_modulemethods,ArrayListUnmanagedappend signatures). - Update CI Zig version and extend
.gitignorefor newer Zig artifacts.
Reviewed changes
Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
build.zig.zon |
Updates dependency pin/hash for hashtree. |
build.zig |
Adjusts build script to newer Zig build/module APIs. |
.gitignore |
Normalizes .zig-cache/ entry and adds zig-pkg/. |
.github/workflows/ci.yml |
Updates Zig toolchain version used in CI. |
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Pull request overview
Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.
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wemeetagain
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Apr 17, 2026
GrapeBaBa
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Apr 21, 2026
Four of the five Zig-0.16-upgrade PRs on our dependency forks have merged into ChainSafe upstream main: * ChainSafe/blst.zig#4 → 6ad139a * ChainSafe/hashtree-z#10 → 56e406f * ChainSafe/snappy.zig#5 → 7139424 * ChainSafe/zig-yaml#1 → b74f4e8 Switch from `lodekeeper-z/<repo>?ref=chore/zig-master` to the merged commit on `ChainSafe/<repo>` main for each. Content is identical so the existing `hash` fields stay valid. `zapi` (ChainSafe/zapi#9) is still open upstream — bump the `lodekeeper-z/zapi` commit pointer to the current PR head (fefb88ebf5c9) which includes the latest port/refactor work; TODO note to switch to ChainSafe/zapi once ChainSafe#9 merges.
wemeetagain
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Apr 24, 2026
## Motivation Get the codebase cleanly compatible with **Zig 0.16.0** release, following the new "explicit `io` everywhere, no hidden global state" design — without changing runtime behavior. ## Description - **`std.Io`** — File/Dir operations, `Mutex`/`Condition`/`Event` (cancelable vs uncancelable split), entropy via `io.random`/`io.randomSecure`, timestamps via `std.Io.Timestamp` - **ArrayList unmanaged** — allocator threaded through `deinit`/`append`/`resize`/`ensureCapacity`/`clone`; replace `items.len = N` hacks with `resize` / `expandToCapacity` / `appendNTimesAssumeCapacity` (preserves semantics, matches `initCapacity`'s Precise allocation) - **Struct builder** — `@Type(.@"struct" = ...)` → `@Struct(names, types, attrs)` builtin in `ssz/type/container.zig` - **Copy-elision workaround** — `std.Io` 0.16 result-location semantics pre-write the union tag of the assignment target, so reads from `self.state.init_group.*` during RHS evaluation would observe the new variant. Snapshot pre-upgrade fields to locals in `state_transition.zig` fork-upgrade chain and `era/Writer.zig` - **ThreadPool** — `io` is a parameter on `init`/`deinit`/`verifyMultipleAggregateSignatures`/`aggregateVerify` (not a stored field); normal paths use cancelable `lock`; shutdown + `submitAndWait.done.wait` stay uncancelable with comments explaining the invariant - **Shared `src/time.zig`** — `timestampNow` / `since (Duration)` / `durationSeconds`, replacing four duplicated helper pairs across `state_transition` and `bench` - **IO signature convention** — `(allocator?, io, file, ...)` applied consistently to `e2s.*` and `era.*` - **Reader API polish** — `takeArray` (zero-copy) + `readSliceAll` where appropriate; drop single-buffer `readVecAll` and `catch |err| return err` - **Other**: `RefCount` comptime-reflect on wrapped T's deinit arity (1-arg vs 2-arg) so 0.16 unmanaged `ArrayList` and project types with stored allocators both work; `sanitize_c = .trap` on blst artifact so Debug fuzz builds link without `libubsan`; untrack 426 stale `test/fuzz/zig-pkg/` entries from the git index - **CI**: `ZIG_VERSION` bumped `0.14.1 → 0.16.0`; `zbuild` sync-check + `build-examples` jobs temporarily commented out pending upstream Zig 0.16 support ## Dependency PRs Each Zig 0.16 upgrade landed as a dedicated PR on the upstream repo. `build.zig.zon` points at `lodekeeper-z` forks on the `chore/zig-master` branch until these merge and cut releases: | Dependency | Upstream PR | |---|---| | `blst` | [ChainSafe/blst.zig#4](ChainSafe/blst.zig#4) | | `hashtree` | [ChainSafe/hashtree-z#10](ChainSafe/hashtree-z#10) | | `snappy` | [ChainSafe/snappy.zig#5](ChainSafe/snappy.zig#5) | | `yaml` | [ChainSafe/zig-yaml#1](ChainSafe/zig-yaml#1) | | `zapi` | [ChainSafe/zapi#9](ChainSafe/zapi#9) | | `httpz` (disabled) | [karlseguin/http.zig#191](karlseguin/http.zig#191) |
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Upgrade to Zig 0.16.0-dev (master) — part of the lodestar-z Zig master upgrade effort.
Key changes:
std.io→std.Iomigrationstd.Io.Dirmethods now require explicitioparameter🤖 Generated with AI assistance