Bazel 7.2.0 and 7.2.1: Label '//java/common:java_common.bzl' is invalid

[mvukov]

Description of the bug:

Please see https://github.com/mvukov/rules_ros2/actions/runs/9665963740/job/26668343264?pr=331. Since 7.2.0 I get this error:

ERROR: Skipping '//...': error loading package under directory '': error loading package '~/.cache/bazel-repo/bazel/_bazel_runner/d53d663888cb7d4fa0ce43a097f11d2b/install/rules_java/toolchains': at /__w/rules_ros2/rules_ros2/~/.cache/bazel-repo/bazel/_bazel_runner/d53d663888cb7d4fa0ce43a097f11d2b/install/rules_java/toolchains/java_toolchain_alias.bzl:17:6: Label '//java/common:java_common.bzl' is invalid because 'java/common' is not a package; perhaps you meant to put the colon here: '//:java/common/java_common.bzl'?
ERROR: error loading package under directory '': error loading package '~/.cache/bazel-repo/bazel/_bazel_runner/d53d663888cb7d4fa0ce43a097f11d2b/install/rules_java/toolchains': at /__w/rules_ros2/rules_ros2/~/.cache/bazel-repo/bazel/_bazel_runner/d53d663888cb7d4fa0ce43a097f11d2b/install/rules_java/toolchains/java_toolchain_alias.bzl:17:6: Label '//java/common:java_common.bzl' is invalid because 'java/common' is not a package; perhaps you meant to put the colon here: '//:java/common/java_common.bzl'?

This is a PR in my repo where the failure happens: mvukov/rules_ros2#331. The CI config is in https://github.com/mvukov/rules_ros2/blob/main/.github/workflows/main.yml, and the build image in https://github.com/mvukov/bazel_builder/blob/ba61fac1727043eb4e80fdd895ad4ad158b7b141/Dockerfile.

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.

No response

Which operating system are you running Bazel on?

Ubuntu 22.04

What is the output of bazel info release?

7.2.1

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 HEAD ?

No response

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

The failures start with an update to Bazel 7.2.0, also happens with Bazel 7.2.1.

Have you found anything relevant by searching the web?

No response

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

No response

[fmeum]

@hvadehra