windows: "failed to create installation symlink" when output_base is in a docker volume

[lripoche]

Description of the bug:

My CI builds are executed on Windows within windows containers. I want to share a cache between all this containers to reduce build times.

When I run a container with a volume mounted on my drive, Bazel returns this error :

Extracting Bazel installation...
ERROR: SymlinkDirectories(C:/Users/ContainerAdministrator/_bazel_ContainerAdministrator/install/c9ea1a9caee100e72d651d25da00df4d, c:\bazel\install): CreateJunction:
FATAL: failed to create installation symlink 'c:\bazel\install': success

The install directory is created so I do not understand this error. Manually I can create both a junction or a symlink without error.

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

1. Run a windows container with a mounted directory
   docker run -it -v C:\cache:C:\bazel mcr.microsoft.com/windows/server:ltsc2022
2. Run bazel with it's output_base within cache directory :

cd my_bazel_repo
bazel --output_base=C:\bazel build //sometarget

Which operating system are you running Bazel on?

Windows 10 Pro / Windows Server 2022 Standard Edition

What is the output of bazel info release?

release 5.4.0

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

No response

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

No response

Have you found anything relevant by searching the web?

No response

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

I've noticed that this bug does not occur if the host OS is Windows Server 20XX Datacenter Edition.

I haven't found any info on that but to me Bazel should not return this error since the install directory is created.

[github-actions]

Thank you for contributing to the Bazel repository! This issue has been marked as stale since it has not had any activity in the last 30 days. It will be closed in the next 7 days unless any other activity occurs or one of the following labels is added: "not stale", "awaiting-bazeler".