@Techatrix OK, here are the details:

Environment

OS: Windows 11 WSL2 Fedora-42
Zig: 0.16.0-dev.70+73a0b5441
Zls: 0.16.0-dev.3+1840a4b8

Code

mkdir exp && cd exp
zig init

Zls VSCode Output

log info

2025-09-05 00:01:34.153 [info] Starting ZLS 0.16.0-dev.3+1840a4b8 @ '/home/lin_zhenming/.vscode-server/data/User/globalStorage/ziglang.vscode-zig/zls/x86_64-linux-0.16.0-dev.3+1840a4b8/zls' 2025-09-05 00:01:34.153 [info] Log File: /home/lin_zhenming/.cache/zls/zls.log (info) 2025-09-05 00:01:34.154 [info] Client Info: Visual Studio Code (1.103.2) 2025-09-05 00:01:34.156 [info] added Workspace Folder: file:///home/lin_zhenming/exp 2025-09-05 00:01:34.174 [info] Loaded build file 'file:///home/lin_zhenming/exp/build.zig' 2025-09-05 00:01:34.210 [info] Set config option 'semantic_tokens' to "partial" 2025-09-05 00:01:34.210 [info] Set config option 'builtin_path' to "/home/lin_zhenming/.cache/zls/builtin.zig" 2025-09-05 00:01:34.211 [info] Set config option 'zig_lib_path' to "/opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib" 2025-09-05 00:01:34.212 [info] Set config option 'zig_exe_path' to "/usr/sbin/zig" 2025-09-05 00:01:34.213 [info] Set config option 'build_runner_path' to "/home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig" 2025-09-05 00:01:34.213 [info] Set config option 'global_cache_path' to "/home/lin_zhenming/.cache/zls" 2025-09-05 00:01:34.214 [info] trying to start Build-On-Save for 'file:///home/lin_zhenming/exp' 2025-09-05 00:01:42.763 [error] thread 2803 panic: integer overflow 2025-09-05 00:01:42.764 [error] Failed to execute build runner to collect build configuration, command: cd /home/lin_zhenming/exp;/usr/sbin/zig build --build-runner /home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig --zig-lib-dir /opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib Error: build.zig:86:12: error: expected ';' after statement exe.gen ^

2025-09-05 00:01:42.921 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:411:75: 0x1245771 in errorBundleSourceLocationToRange (zls)
2025-09-05 00:01:42.921 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:338:59: 0x121a70e in convertErrorBundleToLSPDiangostics (zls)
2025-09-05 00:01:42.921 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:302:47: 0x11bce5f in publishDiagnostics (zls)
2025-09-05 00:01:42.921 [error] /home/runner/work/zls/zls/src/DocumentStore.zig:1146:59: 0x116c3cb in invalidateBuildFileWorker (zls)
2025-09-05 00:01:42.921 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:230:39: 0x116a9fa in runFn (zls)
2025-09-05 00:01:42.922 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:293:27: 0x10adbfc in entryFn (zls)
2025-09-05 00:01:42.922 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/os/linux/x86_64.zig:119:5: 0x10e4fa1 in clone (zls)
2025-09-05 00:01:42.922 [error] ???:?:?: 0x0 in ??? (???)
2025-09-05 00:01:42.963 [info] Connection to server got closed. Server will restart.
2025-09-05 00:01:42.972 [error] Server process exited with signal SIGABRT.
2025-09-05 00:01:42.973 [info] Starting ZLS 0.16.0-dev.3+1840a4b8 @ '/home/lin_zhenming/.vscode-server/data/User/globalStorage/ziglang.vscode-zig/zls/x86_64-linux-0.16.0-dev.3+1840a4b8/zls'
2025-09-05 00:01:42.974 [info] Log File: /home/lin_zhenming/.cache/zls/zls.log (info)
2025-09-05 00:01:42.974 [info] Client Info: Visual Studio Code (1.103.2)
2025-09-05 00:01:42.975 [info] added Workspace Folder: file:///home/lin_zhenming/exp
2025-09-05 00:01:42.992 [info] Loaded build file 'file:///home/lin_zhenming/exp/build.zig'
2025-09-05 00:01:43.027 [info] Set config option 'semantic_tokens' to "partial"
2025-09-05 00:01:43.027 [info] Set config option 'builtin_path' to "/home/lin_zhenming/.cache/zls/builtin.zig"
2025-09-05 00:01:43.027 [info] Set config option 'zig_lib_path' to "/opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib"
2025-09-05 00:01:43.027 [info] Set config option 'zig_exe_path' to "/usr/sbin/zig"
2025-09-05 00:01:43.028 [info] Set config option 'build_runner_path' to "/home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig"
2025-09-05 00:01:43.029 [info] Set config option 'global_cache_path' to "/home/lin_zhenming/.cache/zls"
2025-09-05 00:01:43.029 [info] trying to start Build-On-Save for 'file:///home/lin_zhenming/exp'
2025-09-05 00:01:43.250 [error] thread 2895 panic: integer overflow
2025-09-05 00:01:43.250 [error] Failed to execute build runner to collect build configuration, command:
cd /home/lin_zhenming/exp;/usr/sbin/zig build --build-runner /home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig --zig-lib-dir /opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib
Error: build.zig:86:12: error: expected ';' after statement
exe.gen
^

2025-09-05 00:01:43.407 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:411:75: 0x1245771 in errorBundleSourceLocationToRange (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:338:59: 0x121a70e in convertErrorBundleToLSPDiangostics (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:302:47: 0x11bce5f in publishDiagnostics (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/zls/zls/src/DocumentStore.zig:1146:59: 0x116c3cb in invalidateBuildFileWorker (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:230:39: 0x116a9fa in runFn (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:293:27: 0x10adbfc in entryFn (zls)
2025-09-05 00:01:43.407 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/os/linux/x86_64.zig:119:5: 0x10e4fa1 in clone (zls)
2025-09-05 00:01:43.407 [error] ???:?:?: 0x0 in ??? (???)
2025-09-05 00:01:43.443 [info] Connection to server got closed. Server will restart.
2025-09-05 00:01:43.450 [error] Server process exited with signal SIGABRT.
2025-09-05 00:01:43.452 [info] Starting ZLS 0.16.0-dev.3+1840a4b8 @ '/home/lin_zhenming/.vscode-server/data/User/globalStorage/ziglang.vscode-zig/zls/x86_64-linux-0.16.0-dev.3+1840a4b8/zls'
2025-09-05 00:01:43.452 [info] Log File: /home/lin_zhenming/.cache/zls/zls.log (info)
2025-09-05 00:01:43.452 [info] Client Info: Visual Studio Code (1.103.2)
2025-09-05 00:01:43.452 [info] added Workspace Folder: file:///home/lin_zhenming/exp
2025-09-05 00:01:43.466 [info] Loaded build file 'file:///home/lin_zhenming/exp/build.zig'
2025-09-05 00:01:43.499 [info] Set config option 'semantic_tokens' to "partial"
2025-09-05 00:01:43.499 [info] Set config option 'builtin_path' to "/home/lin_zhenming/.cache/zls/builtin.zig"
2025-09-05 00:01:43.500 [info] Set config option 'zig_lib_path' to "/opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib"
2025-09-05 00:01:43.500 [info] Set config option 'zig_exe_path' to "/usr/sbin/zig"
2025-09-05 00:01:43.500 [info] Set config option 'build_runner_path' to "/home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig"
2025-09-05 00:01:43.501 [info] Set config option 'global_cache_path' to "/home/lin_zhenming/.cache/zls"
2025-09-05 00:01:43.502 [info] trying to start Build-On-Save for 'file:///home/lin_zhenming/exp'
2025-09-05 00:01:43.730 [error] thread 2931 panic: integer overflow
2025-09-05 00:01:43.730 [error] Failed to execute build runner to collect build configuration, command:
cd /home/lin_zhenming/exp;/usr/sbin/zig build --build-runner /home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig --zig-lib-dir /opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib
Error: build.zig:86:12: error: expected ';' after statement
exe.gen
^

2025-09-05 00:01:43.878 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:411:75: 0x1245771 in errorBundleSourceLocationToRange (zls)
2025-09-05 00:01:43.879 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:338:59: 0x121a70e in convertErrorBundleToLSPDiangostics (zls)
2025-09-05 00:01:43.879 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:302:47: 0x11bce5f in publishDiagnostics (zls)
2025-09-05 00:01:43.879 [error] /home/runner/work/zls/zls/src/DocumentStore.zig:1146:59: 0x116c3cb in invalidateBuildFileWorker (zls)
2025-09-05 00:01:43.879 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:230:39: 0x116a9fa in runFn (zls)
2025-09-05 00:01:43.880 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:293:27: 0x10adbfc in entryFn (zls)
2025-09-05 00:01:43.880 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/os/linux/x86_64.zig:119:5: 0x10e4fa1 in clone (zls)
2025-09-05 00:01:43.880 [error] ???:?:?: 0x0 in ??? (???)
2025-09-05 00:01:43.917 [info] Connection to server got closed. Server will restart.
2025-09-05 00:01:43.926 [error] Server process exited with signal SIGABRT.
2025-09-05 00:01:43.927 [info] Starting ZLS 0.16.0-dev.3+1840a4b8 @ '/home/lin_zhenming/.vscode-server/data/User/globalStorage/ziglang.vscode-zig/zls/x86_64-linux-0.16.0-dev.3+1840a4b8/zls'
2025-09-05 00:01:43.928 [info] Log File: /home/lin_zhenming/.cache/zls/zls.log (info)
2025-09-05 00:01:43.928 [info] Client Info: Visual Studio Code (1.103.2)
2025-09-05 00:01:43.928 [info] added Workspace Folder: file:///home/lin_zhenming/exp
2025-09-05 00:01:43.942 [info] Loaded build file 'file:///home/lin_zhenming/exp/build.zig'
2025-09-05 00:01:43.980 [info] Set config option 'semantic_tokens' to "partial"
2025-09-05 00:01:43.980 [info] Set config option 'builtin_path' to "/home/lin_zhenming/.cache/zls/builtin.zig"
2025-09-05 00:01:43.980 [info] Set config option 'zig_lib_path' to "/opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib"
2025-09-05 00:01:43.982 [info] Set config option 'zig_exe_path' to "/usr/sbin/zig"
2025-09-05 00:01:43.983 [info] Set config option 'build_runner_path' to "/home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig"
2025-09-05 00:01:43.984 [info] Set config option 'global_cache_path' to "/home/lin_zhenming/.cache/zls"
2025-09-05 00:01:43.984 [info] trying to start Build-On-Save for 'file:///home/lin_zhenming/exp'
2025-09-05 00:01:44.174 [error] thread 2973 panic: integer overflow
2025-09-05 00:01:44.174 [error] Failed to execute build runner to collect build configuration, command:
cd /home/lin_zhenming/exp;/usr/sbin/zig build --build-runner /home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig --zig-lib-dir /opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib
Error: build.zig:86:12: error: expected ';' after statement
exe.gen
^

2025-09-05 00:01:44.304 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:411:75: 0x1245771 in errorBundleSourceLocationToRange (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:338:59: 0x121a70e in convertErrorBundleToLSPDiangostics (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:302:47: 0x11bce5f in publishDiagnostics (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/zls/zls/src/DocumentStore.zig:1146:59: 0x116c3cb in invalidateBuildFileWorker (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:230:39: 0x116a9fa in runFn (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:293:27: 0x10adbfc in entryFn (zls)
2025-09-05 00:01:44.304 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/os/linux/x86_64.zig:119:5: 0x10e4fa1 in clone (zls)
2025-09-05 00:01:44.304 [error] ???:?:?: 0x0 in ??? (???)
2025-09-05 00:01:44.338 [info] Connection to server got closed. Server will restart.
2025-09-05 00:01:44.347 [error] Server process exited with signal SIGABRT.
2025-09-05 00:01:44.348 [info] Starting ZLS 0.16.0-dev.3+1840a4b8 @ '/home/lin_zhenming/.vscode-server/data/User/globalStorage/ziglang.vscode-zig/zls/x86_64-linux-0.16.0-dev.3+1840a4b8/zls'
2025-09-05 00:01:44.348 [info] Log File: /home/lin_zhenming/.cache/zls/zls.log (info)
2025-09-05 00:01:44.348 [info] Client Info: Visual Studio Code (1.103.2)
2025-09-05 00:01:44.348 [info] added Workspace Folder: file:///home/lin_zhenming/exp
2025-09-05 00:01:44.362 [info] Loaded build file 'file:///home/lin_zhenming/exp/build.zig'
2025-09-05 00:01:44.393 [info] Set config option 'semantic_tokens' to "partial"
2025-09-05 00:01:44.393 [info] Set config option 'builtin_path' to "/home/lin_zhenming/.cache/zls/builtin.zig"
2025-09-05 00:01:44.394 [info] Set config option 'zig_lib_path' to "/opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib"
2025-09-05 00:01:44.394 [info] Set config option 'zig_exe_path' to "/usr/sbin/zig"
2025-09-05 00:01:44.394 [info] Set config option 'build_runner_path' to "/home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig"
2025-09-05 00:01:44.394 [info] Set config option 'global_cache_path' to "/home/lin_zhenming/.cache/zls"
2025-09-05 00:01:44.394 [info] trying to start Build-On-Save for 'file:///home/lin_zhenming/exp'
2025-09-05 00:01:44.506 [error] thread 3008 panic: integer overflow
2025-09-05 00:01:44.507 [error] Failed to execute build runner to collect build configuration, command:
cd /home/lin_zhenming/exp;/usr/sbin/zig build --build-runner /home/lin_zhenming/.cache/zls/build_runner/cf46548b062a7e79e448e80c05616097/build_runner.zig --zig-lib-dir /opt/zig-x86_64-linux-0.16.0-dev.70+73a0b5441/lib
Error: build.zig:86:12: error: expected ';' after statement
exe.gen
^

2025-09-05 00:01:44.693 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:411:75: 0x1245771 in errorBundleSourceLocationToRange (zls)
2025-09-05 00:01:44.693 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:338:59: 0x121a70e in convertErrorBundleToLSPDiangostics (zls)
2025-09-05 00:01:44.693 [error] /home/runner/work/zls/zls/src/DiagnosticsCollection.zig:302:47: 0x11bce5f in publishDiagnostics (zls)
2025-09-05 00:01:44.693 [error] /home/runner/work/zls/zls/src/DocumentStore.zig:1146:59: 0x116c3cb in invalidateBuildFileWorker (zls)
2025-09-05 00:01:44.695 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:230:39: 0x116a9fa in runFn (zls)
2025-09-05 00:01:44.695 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/Thread/Pool.zig:293:27: 0x10adbfc in entryFn (zls)
2025-09-05 00:01:44.695 [error] /home/runner/work/_temp/2ea0985a-dbcb-409a-909c-6334ef410d1a/zig-x86_64-linux-0.16.0-dev.27+83f773fc6/lib/std/os/linux/x86_64.zig:119:5: 0x10e4fa1 in clone (zls)
2025-09-05 00:01:44.695 [error] ???:?:?: 0x0 in ??? (???)
2025-09-05 00:01:44.727 [error] The ZLS language server server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
2025-09-05 00:01:44.729 [error] Server process exited with signal SIGABRT.

Uh oh!

zls frequently crashed when editing build.zig with vscode setting "files.autoSave": "afterDelay" #452

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`zls` frequently crashed when editing `build.zig` with vscode setting `"files.autoSave": "afterDelay"` #452