bazelbuild/bazel

Sandbox blocks accessing external repo file when vendor mode is enabled

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#27156 opened on Oct 6, 2025

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 (4 comments) (0 reactions) (1 assignee)Java (25,384 stars) (4,465 forks)batch import
P2help wantedteam-ExternalDepstype: bug

Description

Description of the bug:

Context: https://github.com/protocolbuffers/protobuf/issues/23504

Which category does this issue belong to?

No response

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Follow the instructions in https://github.com/enola-dev/enola/issues/1730#issuecomment-3289885865

Which operating system are you running Bazel on?

Linux

What is the output of bazel info release?

No response

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

8.4.1

What's the output of git remote get-url origin; git rev-parse HEAD ?

If this is a regression, please try to identify the Bazel commit where the bug was introduced with bazelisk --bisect.

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response

Contributor guide

Tech stack
java
Domain
build system
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Bazel build systemsandboxingvendor mode concept
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate the sandbox implementation in Bazel, particularly the handling of vendor mode. Review the referenced issue (protobuf#23504) and the reproduction steps in comment #3289885865 on issue #1730. Look for how external repository files are blocked in sandboxed environments when vendor mode is enabled. The fix may involve modifying sandbox file access rules.