Latest version of ZLS does not build with latest version of Zig

[t-puetz]

Zig Version

0.15.0-dev.621+a63f7875f

ZLS Version

0d77561

Client / Code Editor / Extensions

No response

Steps to Reproduce and Observed Behavior

Latest version of ZLS does not build with latest version of Zig

Expected Behavior

Zls builds successfully

Relevant log output

install
└─ install zls
   └─ zig build-exe zls Debug native
      └─ run lsp-codegen (lsp_types.zig) failure
error: failed to spawn and capture stdio from .zig-cache/o/f8f3999b8519534799b099884de13387/lsp-codegen: FileNotFound
Build Summary: 6/10 steps succeeded; 1 failed
install transitive failure
└─ install zls transitive failure
   └─ zig build-exe zls Debug native transitive failure
      └─ run lsp-codegen (lsp_types.zig) failure
error: the following build command failed with exit code 1:
.zig-cache/o/6dc6ed7f0d4da5577175e5d8723bc9b1/build /usr/lib/zig/zig /usr/lib/zig/lib /home/overflyer/data/repos/zls .zig-cache /home/overflyer/.cache/zig --seed 0x6697a154 -Z4f428bed51f95822

[ComixHe]

I encountered the same issue and determined that it's a bug in the Zig standard library.
After a brief investigation, I found that zig build initiates child processes with an incorrect working directory.
Fortunately, this issue has already been fixed in this commit.

[t-puetz]

Thanks. However I can not confirm that. I built 0.15.0-dev.629+a5861fcdd from source which already includes that commit and the error is still occuring when I try to build ZLS with it.

[mochalins]

Build succeeds for me with 0.15.0-dev.629+a5861fcdd

[ComixHe]

Thanks. However I can not confirm that. I built 0.15.0-dev.629+a5861fcdd from source which already includes that commit and the error is still occuring when I try to build ZLS with it.

maybe your build has been cached, remove /path/to/project/.zig-cache and try it again?

[mochalins]

maybe your build has been cached, remove /path/to/project/.zig-cache and try it again?

Still builds after removing cache. As an aside, I was also able to reproduce the build issue immediately after ziglang/zig#23836 was merged, so I don't think this is a cache issue; the build went from failling with the error you described to succeeding after I updated my Zig compiler installation.

Are you sure you've correctly built/installed 0.15.0-dev.629+a5861fcdd?

Or perhaps, this may be an environment issue; I'm building successfully on x86_64 Linux. Are you on a different arch/OS?

[ComixHe]

the build went from failling with the error you described to succeeding after I updated my Zig compiler installation.

Based on the changes introduced in that commit, I manually modified Run.zig and ZLS built successfully (x86_64/ArchLinux)

[t-puetz]

maybe your build has been cached, remove /path/to/project/.zig-cache and try it again?

Still builds after removing cache. As an aside, I was also able to reproduce the build issue immediately after ziglang/zig#23836 was merged, so I don't think this is a cache issue; the build went from failling with the error you described to succeeding after I updated my Zig compiler installation.

Are you sure you've correctly built/installed 0.15.0-dev.629+a5861fcdd?

Or perhaps, this may be an environment issue; I'm building successfully on x86_64 Linux. Are you on a different arch/OS?

Mhmm yes I am pretty sure I installed 0.15.0-dev.629+a5861fcdd correctly. I am on x86_64 Manjaro Linux testing branch. I first compiled LLVM 20 myself and installed it in $HOME/opt/llvm/20 and then used it to compile Zig. I then moved stage3/bin/zig to /usr/bin/ and stage3/lib/zig/* to /usr/lib/zig/. I confirmed the version by running zig version. I did it like this many times already and also built ZLS with a Zig version that I built from source.

I also removed .zig-cache inside the ZLS repo folder. I then ran zig build and the same error occured. I am at work right now and it will take about 8 hours until I am at my PC again.

[mochalins]

Hmm, I'm not sure what's going on. My build still completes successfully after wiping out both the local and global Zig caches. I'm on Fedora Linux, using the distro-provided LLVM 20, kernel version 6.14.6.

Building works in both debug and ReleaseSafe optimize modes.

[t-puetz]

Alright I am back from work now and tested it three more times to make sure. Zig version is 0.15.0-dev.629+a5861fcdd, I the newest commits pulled from the ZLS repo, .zig.cache was deleted on first try, I then tried compiling 2 more times and deleted .zig-cache always up front, and I also compiled twice with existing .zig-cache folder. The error remains:

$ zig build
install
└─ install zls
└─ zig build-exe zls Debug native
└─ run lsp-codegen (lsp_types.zig) failure
error: failed to spawn and capture stdio from .zig-cache/o/a8a0d74851a844ff9c0f3bcff7f598fa/lsp-codegen: FileNotFound
Build Summary: 6/10 steps succeeded; 1 failed
install transitive failure
└─ install zls transitive failure
└─ zig build-exe zls Debug native transitive failure
└─ run lsp-codegen (lsp_types.zig) failure
error: the following build command failed with exit code 1:
.zig-cache/o/4f7015f6eb5ab3d92d48dd8f91ea3752/build /usr/lib/zig/zig /usr/lib/zig/lib /home/overflyer/data/repos/zls .zig-cache /home/overflyer/.cache/zig --seed 0x8df4a356 -Z180a2101efba9533

[t-puetz]

OK UPDATE: I compiled 0.15.0-dev.631+9a3540d61 and again with or without .zig-cache I get the same error. I even tried to delete my ~/.cache/zls and ~/.cache/zig. No change. Same error.

[Techatrix]

This issue appears to be caused by an internal change to the Zig compiler that exposed an issue in the build system which has already been fixed in ziglang/zig#23946 (0.15.0-dev.627+ef92c156b). Once a recent enough version is provided by ziglang.org, ZLS will require said version to close this issue.

@t-puetz Not sure why you are still getting this issue after installing a recent enough Zig version. I would suggest to verify that the Zig standard library matches the Zig compiler version you are using. Run zig env to verify the standard library path and then check lib/std/Build/Step/Run.zig has the required fix applied.

[kiffpuppygames]

Hi, I'm getting the same error.

I emptied all my cache folders and installed versions of zig. Then I setup a fresh Zig env using ver 0.15.0-dev.621+a63f7875f, and a fresh clone of Zls. -> Build failed

Then checked Zig env:

{
 "zig_exe": "/home/......./zig/0.15.0-dev.621+a63f7875f/files/zig",
 "lib_dir": "/home/......./zig/0.15.0-dev.621+a63f7875f/files/lib",
 "std_dir": "/home/......./zig/0.15.0-dev.621+a63f7875f/files/lib/std",
 "global_cache_dir": "/home/......./.cache/zig",
 "version": "0.15.0-dev.621+a63f7875f",
 "target": "x86_64-linux.6.14.6...6.14.6-gnu.2.41",
 "env": {
  "ZIG_GLOBAL_CACHE_DIR": null,
  "ZIG_LOCAL_CACHE_DIR": null,
  "ZIG_LIB_DIR": null,
  "ZIG_LIBC": null,
  "ZIG_BUILD_RUNNER": null,
  "ZIG_VERBOSE_LINK": null,
  "ZIG_VERBOSE_CC": null,
  "ZIG_BTRFS_WORKAROUND": null,
  "ZIG_DEBUG_CMD": null,
  "CC": null,
  "NO_COLOR": null,
  "CLICOLOR_FORCE": null,
  "XDG_CACHE_HOME": null,
  "HOME": "/home/......."
 }
}

Then I checked Run.zig and it did not have the the fix applied so I manually applied it. And zls built. I checked the zig repository and it does indeed have the change. I downloaded the archive from https://ziglang.org/download/ and the change is not reflected in the archive. I feel like I'm loosing my mind am i seeing this correctly?

[kiffpuppygames]

I've created an issue on the zig repo and will see what they say.

[Techatrix]

@kiffpuppygames The fix I was talking about was added in Zig 0.15.0-dev.627+ef92c156b. Zig 0.15.0-dev.621+a63f7875f is an older version (621 < 627) that does not include the fix. The prebuilt binaries at ziglang.org have not yet updated to a recent enough version. Unless you building from source or are overriding the zig standard library path, you will have to wait until a new prebuilt binary has been built.