Summary
While trying to run ShuanOS verification inside a3s-box, copying a host-mounted repository tree from the guest with tar failed with Cannot close: Bad file descriptor for files under the mounted source tree.
This makes the box unreliable for CI-style verification workflows that mount a repo read-only and copy it into a guest-local temporary workspace before installing Linux-native dependencies.
Environment
- Host: macOS,
/Users/roylin/code/os
a3s-box version: 3.0.8- Image:
docker.io/library/node:24-bookworm
- Volume:
-v /Users/roylin/code/os:/workspace
- Workdir:
/workspace
Reproduction
a3s-box run --rm \
--cpus 4 \
--memory 6g \
--package-cache pnpm \
-v /Users/roylin/code/os:/workspace \
-w /workspace \
docker.io/library/node:24-bookworm -- \
bash -lc 'set -euxo pipefail; rm -rf /tmp/os-check; mkdir -p /tmp/os-check; tar --exclude=./node_modules --exclude=./.git --exclude=./dist --exclude=./temp --exclude=./storage --exclude=./.pnpm-store -cf - . | tar -C /tmp/os-check -xf -; cd /tmp/os-check; corepack enable; pnpm install --frozen-lockfile --prefer-offline; pnpm exec biome --version'
Actual result
The copy failed inside the mounted tree:
tar: ./apps/api/storage/git-cache/repositories/29e48e48-42ad-431d-a480-472fb4765010.git/hooks/pre-merge-commit.sample: Cannot close: Bad file descriptor
tar: ./apps/api/storage/git-cache/repositories/616d184f-1a33-4fbf-b982-b18da059b0c4.git/hooks/pre-push.sample: Cannot close: Bad file descriptor
tar: ./apps/api/builtin-assets/agents/legal/contract-review/web/node_modules/resolve/test/dotdot/index.js: Cannot close: Bad file descriptor
tar: ./apps/api/builtin-assets/agents/legal/contract-review/server/node_modules/@angular-devkit/schematics/node_modules/rxjs/dist/cjs/internal/observable/fromEvent.js: Cannot close: Bad file descriptor
tar: Exiting with failure status due to previous errors
Expected result
Reading regular files from a mounted source tree should not fail with Bad file descriptor. If a host-side file changes during traversal, the error should be explicit and limited to that race, not a generic close failure.
Notes
A workaround for this deploy was to avoid a3s-box for verification and use Docker on the server, but this blocks using A3S Box as the default build/release environment for this repo.
Summary
While trying to run ShuanOS verification inside
a3s-box, copying a host-mounted repository tree from the guest withtarfailed withCannot close: Bad file descriptorfor files under the mounted source tree.This makes the box unreliable for CI-style verification workflows that mount a repo read-only and copy it into a guest-local temporary workspace before installing Linux-native dependencies.
Environment
/Users/roylin/code/osa3s-box version:3.0.8docker.io/library/node:24-bookworm-v /Users/roylin/code/os:/workspace/workspaceReproduction
a3s-box run --rm \ --cpus 4 \ --memory 6g \ --package-cache pnpm \ -v /Users/roylin/code/os:/workspace \ -w /workspace \ docker.io/library/node:24-bookworm -- \ bash -lc 'set -euxo pipefail; rm -rf /tmp/os-check; mkdir -p /tmp/os-check; tar --exclude=./node_modules --exclude=./.git --exclude=./dist --exclude=./temp --exclude=./storage --exclude=./.pnpm-store -cf - . | tar -C /tmp/os-check -xf -; cd /tmp/os-check; corepack enable; pnpm install --frozen-lockfile --prefer-offline; pnpm exec biome --version'Actual result
The copy failed inside the mounted tree:
Expected result
Reading regular files from a mounted source tree should not fail with
Bad file descriptor. If a host-side file changes during traversal, the error should be explicit and limited to that race, not a generic close failure.Notes
A workaround for this deploy was to avoid
a3s-boxfor verification and use Docker on the server, but this blocks using A3S Box as the default build/release environment for this repo.