java_proto_library: difference between bazel7 and bazel8

[tpasternak]

Description of the bug:

for java_proto_library, JavaInfo providers contents are slightly different. In bazel 7 it didn't contain any java outputs.

USE_BAZEL_VERSION=7.4.1 bazelisk cquery --output=starlark "--starlark:expr=providers(target)['@@_builtins//:common/java/java_info.bzl%JavaInfo'].java_outputs" //:lib

[]

USE_BAZEL_VERSION=8.0.0rc6 bazelisk cquery --output=starlark "--starlark:expr=providers(target)['@@rules_java+//java/private:java_info.bzl%JavaInfo'].java_outputs" //:lib

[<unknown object com.google.devtools.build.lib.rules.java.JavaRuleOutputJarsProvider$JavaOutput>]

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.

File: BUILD.bazel

   1 load("@protobuf//bazel:java_proto_library.bzl", "java_proto_library")
   2 
   3 java_proto_library(
   4     name = "lib",
   5     deps = [":proto_lib"],
   6 )
   7 
   8 proto_library(
   9     name = "proto_lib",
  10     srcs = ["lib.proto"],
  11 )

File: MODULE.bazel

   1 bazel_dep(
   2     name = "protobuf",
   3     version = "29.0",
   4 )
   5 

File: lib.proto

   1 message Lib {
   2
   3 }   

Which operating system are you running Bazel on?

Linux

What is the output of bazel info release?

8.0.0rc6

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.

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

[hvadehra]

This regression was introduced with the proto rules moving out independently of the java rules. I'll fix in @rules_java