Description of the bug:

3c07a34 seems to have broken a number of downstream projects. https://buildkite.com/bazel/bazel-auto-sheriff-face-with-cowboy-hat/builds/938

Example failure log:

ERROR: Traceback (most recent call last):
--
  | File "/var/lib/buildkite-agent/builds/bk-docker-l5tx/bazel-downstream-projects/protobuf/WORKSPACE", line 65, column 20, in <toplevel>
  | kotlin_repositories()
  | File "/var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/22bc6feb06bf3d09950f383d42d078bc/external/io_bazel_rules_kotlin/src/main/starlark/core/repositories/initialize.bzl", line 96, column 21, in kotlin_repositories
  | rules_repository(
  | Error in repository_rule: invalid repository name '': must start with a letter and contain only letters, digits, '.', '-', or '_'

Identified broken projects:

Protobuf
rules_go
rules_kotlin
rules_rust
rules_scala

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

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Which operating system are you running Bazel on?

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What is the output of bazel info release?

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

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

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Have you found anything relevant by searching the web?

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

No response