bun: 1.3.11 -> 1.3.13 by delafthi · Pull Request #508770 · NixOS/nixpkgs

delafthi · 2026-04-10T22:21:21Z

https://bun.sh/blog/bun-v1.3.12
https://bun.sh/blog/bun-v1.3.13

~~Blocked due to oven-sh/bun#29290. I'll proceed when the fix drops in the new release.~~

Things done

delafthi · 2026-04-11T06:15:29Z

I'll look into the build issues. Especially, with opencode.

etinquis · 2026-04-14T01:43:37Z

FYI (in case it may be relevant) I've opened oven-sh/bun#29290 because I'm not getting runnable executables out of bun build --compile in 1.3.12.

delafthi · 2026-04-15T13:06:35Z

@etinquis thanks, for opening this. I'll make this PR a draft - let's wait for the next release.

https://bun.sh/blog/bun-v1.3.12 https://bun.sh/blog/bun-v1.3.13

delafthi · 2026-04-20T11:15:40Z

Version 1.3.13 dropped. I'll proceed - nixpkgs-review is running. I'll undraft this PR if the results look good.

delafthi · 2026-04-22T15:14:01Z

nixpks-review-gha is unable to finish the build for aarch64-linux. So, I'm pasting the results for the other platforms manually:

`aarch64-darwin`

2026-04-20T12:48:18.8883400Z

✅ 10 packages built:

atuin-desktop
bun
duplicati
filen-cli
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev
opencode
opencode-desktop

`x86_64-darwin`

✅ 7 packages built:

atuin-desktop
duplicati
filen-cli
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev

`x86_64-linux`

❌ 2 packages failed to build:

gitlab-duo
swagger-typescript-api

✅ 15 packages built:

atuin-desktop
balatro-mod-manager
bun
convertx
duplicati
equibop
filen-cli
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev
opencode
opencode-desktop
surrealist
windmill

Error logs: `x86_64-linux`

gitlab-duo

shrinking RPATHs of ELF executables and libraries in /nix/store/apswddqpzvfxq75pqj0kf0p440f3vfrh-gitlab-duo-8.67.0
shrinking /nix/store/apswddqpzvfxq75pqj0kf0p440f3vfrh-gitlab-duo-8.67.0/bin/duo
checking for references to /build/ in /nix/store/apswddqpzvfxq75pqj0kf0p440f3vfrh-gitlab-duo-8.67.0...
patching script interpreter paths in /nix/store/apswddqpzvfxq75pqj0kf0p440f3vfrh-gitlab-duo-8.67.0
Running phase: installCheckPhase
@nix { "action": "setPhase", "phase": "installCheckPhase" }
Executing versionCheckPhase
Did not find version 8.67.0 in the output of the command /nix/store/apswddqpzvfxq75pqj0kf0p440f3vfrh-gitlab-duo-8.67.0/bin/duo --version
323003 |   }
323004 |   enhanceDscWithOpenTelemetryRootSpanName(client);
323005 |   setupEventContextTrace(client);
323006 |   return client;
323007 | }
323008 | function validateOpenTelemetrySetup() {
         ^
SyntaxError: Cannot declare a function that shadows a let/const/class/function variable '_init'.
      at <parse> (/$bunfs/root/duo-linux-x64:323008:1)
      at native:11:43
Bun v1.3.13 (Linux x64)

- Drop prettier substitutions fixed upstream [1] - Replace TS source patch with package.json packageManager pin [2] [1]: anomalyco/opencode#23255 [2]: NixOS/nixpkgs#508770

mdaniels5757 · 2026-05-03T13:38:20Z

`nixpkgs-review` result

Generated using nixpkgs-review.

Command: nixpkgs-review pr 508770
Commit: 9dd5558b06dbdacbf635a3dd36dce1b1a7ee3a89

`x86_64-linux`

✅ 17 packages built:

atuin-desktop
balatro-mod-manager
bun
convertx
duplicati
equibop
filen-cli
gitlab-duo
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev
opencode
opencode-desktop
surrealist
swagger-typescript-api
windmill

`aarch64-linux`

❌ 1 package failed to build:

balatro-mod-manager

✅ 15 packages built:

atuin-desktop
bun
convertx
duplicati
equibop
filen-cli
gitlab-duo
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev
opencode
opencode-desktop
surrealist
windmill

`x86_64-darwin`

✅ 7 packages built:

atuin-desktop
duplicati
filen-cli
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev

`aarch64-darwin`

✅ 10 packages built:

atuin-desktop
bun
duplicati
filen-cli
gleam
gowebly
home-assistant-custom-lovelace-modules.navbar-card
models-dev
opencode
opencode-desktop

Error logs: `aarch64-linux`

balatro-mod-manager

  Require stack:
  - /build/source/node_modules/rollup/dist/native.js
      at Module._resolveFilename (node:internal/modules/cjs/loader:1456:15)
      at defaultResolveImpl (node:internal/modules/cjs/loader:1066:19)
      at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1071:22)
      at Module._load (node:internal/modules/cjs/loader:1242:25)
      at wrapModuleLoad (node:internal/modules/cjs/loader:255:19)
      at Module.require (node:internal/modules/cjs/loader:1556:12)
      at require (node:internal/modules/helpers:152:16)
      at requireWithFriendlyError (/build/source/node_modules/rollup/dist/native.js:46:10)
      at Object.<anonymous> (/build/source/node_modules/rollup/dist/native.js:73:76)
      at Module._compile (node:internal/modules/cjs/loader:1812:14) {
    code: 'MODULE_NOT_FOUND',
    requireStack: [ '/build/source/node_modules/rollup/dist/native.js' ]
  }
}
Node.js v24.14.1

error: script "build" exited with code 1

Error beforeBuildCommand bun run build failed with exit code 1

terlar · 2026-05-08T08:58:29Z

After this change, opencode refuses to launch on at least two WSL machines:

Bisecting: 1 revision left to test after this (roughly 1 step)
[ede7a04c7ae52bfc797a963f6bcf82bc56ed760f] bun: 1.3.11 -> 1.3.13 (#508770)
$ nix run .#opencode -- --version
fish: Job 1, '/nix/store/7i4bcskcq8mvdm4hqygy…' terminated by signal SIGSEGV (Address boundary error)

Not sure exactly why.

terlar · 2026-05-08T09:53:50Z

I used AI to look into this issue and this was the conclusion:

Root cause: bun 1.3.12's new ELF section approach broke the BSS mapping in the compiled binary.
The sequence:
1. bun 1.3.12 changed bun build --compile to embed the app bundle as a real ELF PT_LOAD section (.bun) instead of reading from /proc/self/exe. The .bun section is placed at VMA 0x6511000 — higher than the data+BSS segment.
2. The Linux kernel's ELF loader (load_elf_binary in fs/binfmt_elf.c) computes the BSS region as a single contiguous range using the maximum p_vaddr + p_memsz across all PT_LOAD segments. With .bun dominating at 0xa7a8000, the kernel calls set_brk(0xa7a8000, 0xa7a8000, ...) — which is a no-op since start == end.
3. The data segment's BSS (0x6427000–0x6511000, ~11MB) is never mapped. The kernel only file-mapped 0x6390000–0x6427000.
4. The dynamic linker (_dl_relocate_object_no_relro) tries to apply relocations to pointer slots in the BSS, hits the unmapped page at 0x6510e40, and crashes with SIGSEGV SEGV_MAPERR.
bun 1.3.13 fixed one symptom on NixOS (interpreter path rewrite), but the underlying BSS mapping issue remains — and it manifests here on WSL2.
The fix options:
1. Proper fix (upstream bun): The .bun PT_LOAD segment needs to be placed at a VMA lower than the data+BSS segment, or the kernel ELF loader needs to be taught to handle multiple BSS regions. This is a bun bug to report.
2. Workaround in nixpkgs: Pin bun to 1.3.11 for the opencode build using the corrected overlay from my earlier response — that way bun build --compile uses the old /proc/self/exe approach, which doesn't add the extra PT_LOAD and doesn't corrupt the BSS layout.
3. Post-build binary patch: After building, use patchelf or a custom script to reorder the PT_LOAD segments so .bun comes last, letting the kernel properly map the data segment's BSS. But this is fragile.
The overlay downgrade to bun 1.3.11 is the most practical fix for nixpkgs right now, and the bun issue should be reported upstream.

I currently use the following override:

(final: prev: {
  opencode = prev.opencode.override {
    bun = prev.bun.overrideAttrs (
      old:
      let
        version = "1.3.11";
        sources = {
          "aarch64-darwin" = final.fetchurl {
            url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-darwin-aarch64.zip";
            hash = "sha256-b1o0Z+2crsR5W/eM1HZQfZ+HDH1XuGyUX8szgSZ3L/w=";
          };
          "aarch64-linux" = final.fetchurl {
            url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-linux-aarch64.zip";
            hash = "sha256-0TlE2hKlPsx0v2pyC9HQTEVVwDjf5CI2U1anvkdpH98=";
          };
          "x86_64-darwin" = final.fetchurl {
            url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-darwin-x64-baseline.zip";
            hash = "sha256-+2c5sIv1RVDtqnyCTNWy3KRbagav70CEQwh6YxBfb40=";
          };
          "x86_64-linux" = final.fetchurl {
            url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-linux-x64.zip";
            hash = "sha256-hhG6k1r4hvBabzh0ChUWAybBXl1dB63vlmEwtEk2B+0=";
          };
        };
      in
      {
        inherit version;
        src = sources.${final.stdenvNoCC.hostPlatform.system};
        passthru = old.passthru // {
          inherit sources;
        };
      }
    );
  };
})

terlar · 2026-05-08T10:20:10Z

Seems there is a fix for this upstream oven-sh/bun#29967

So hopefully it is just a matter of time...

delafthi · 2026-05-09T19:10:50Z

@terlar thanks, for the investigation. Let's hope the new release drops soon.

nixpkgs-ci Bot requested review from 06kellyjac, DAlperin, cdmistman, diogomdp and thilobillerbeck April 10, 2026 22:26

nixpkgs-ci Bot added 8.has: package (update) This PR updates a package to a newer version 10.rebuild-linux: 11-100 This PR causes between 11 and 100 packages to rebuild on Linux. 10.rebuild-darwin: 1-10 This PR causes between 1 and 10 packages to rebuild on Darwin. labels Apr 10, 2026

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delafthi marked this pull request as draft April 15, 2026 13:06

delafthi changed the title ~~bun: 1.3.11 -> 1.3.12~~ bun: 1.3.11 -> 1.3.13 Apr 20, 2026

bun: 1.3.11 -> 1.3.13

9dd5558

https://bun.sh/blog/bun-v1.3.12 https://bun.sh/blog/bun-v1.3.13

delafthi force-pushed the delafthi/kwpozkrtymyn branch from 91cfbb3 to 9dd5558 Compare April 20, 2026 11:13

MiniHarinn mentioned this pull request Apr 22, 2026

Update Request: bun 1.3.11 → 1.3.13 #512300

Closed

3 tasks

delafthi marked this pull request as ready for review April 22, 2026 15:14

delafthi assigned GaetanLepage Apr 30, 2026

mdaniels5757 added this pull request to the merge queue May 3, 2026

Merged via the queue into NixOS:master with commit ede7a04 May 3, 2026
30 of 32 checks passed

delafthi deleted the delafthi/kwpozkrtymyn branch May 3, 2026 19:37

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bun: 1.3.11 -> 1.3.13#508770

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