Check failed: nest_in_file_class != pb::JavaFeatures::NestInFileClassFeature::NEST_IN_FILE_CLASS_UNKNOWN Unknown value for nest_in_file_class feature. Try populating the Java feature set defaults in your generator plugin or custom descriptor pool.

[vorburger]

What version of protobuf and what language are you using?
Version: 31.0
Language: Java

What operating system (Linux, Windows, ...) and version?
Linux Fedora 41

What runtime / compiler are you using (e.g., python version or gcc version)
gcc (GCC) 14.2.1 20250110 (Red Hat 14.2.1-7)

What did you do?
Steps to reproduce the behavior:

1. git clone https://github.com/enola-dev/enola.git
2. Checkout rev 54470d73
3. Bump bazel_dep(name = "protobuf", version = "29.4") to 31.0 in MODULE.bazel
4. Add bazel_dep(name = "protoc-gen-validate", version = "1.2.1.bcr.1") because of Error: file '@com_google_protobuf//:protobuf.bzl' does not contain symbol 'py_proto_library' #21231
5. Run ./test.bash (or just something like bazelisk build //...)

What did you expect to see

Working build.

What did you see instead?

 no actions running
Loading: 0 packages loaded
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/rules_swift+/swift/internal/swift_autoconfiguration.bzl:211:14: No 'swiftc' executable found in $PATH. Not auto-generating a Linux Swift toolchain.
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//rls:rls_java_grpc: Proto source with label @@grpc-proto+//:rls_proto should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//xds:envoy_service_status_v3_java_grpc: Proto source with label @@envoy_api+//envoy/service/status/v3:pkg should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//xds:envoy_service_load_stats_v3_java_grpc: Proto source with label @@envoy_api+//envoy/service/load_stats/v3:pkg should be in same package as consuming rule
WARNING: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/services/BUILD.bazel:172:18: in _java_grpc_library rule @@grpc-java+//services:_reflection_java_grpc: target '@@grpc-java+//services:_reflection_java_grpc' depends on deprecated target '@@grpc-proto+//:reflection_proto_deprecated': Use :reflection_proto instead
WARNING: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/services/BUILD.bazel:172:18: in _java_grpc_library rule @@grpc-java+//services:_reflection_java_grpc: target '@@grpc-java+//services:_reflection_java_grpc' depends on deprecated target '@@grpc-proto+//:reflection_java_proto_deprecated': Use :reflection_java_proto instead
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//services:_channelz_java_grpc: Proto source with label @@grpc-proto+//:channelz_proto should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//xds:xds_service_orca_v3_java_grpc: Proto source with label @@xds+//xds/service/orca/v3:pkg should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//grpclb:load_balancer_java_grpc: Proto source with label @@grpc-proto+//:grpclb_load_balancer_proto should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//services:_reflection_java_grpc: Proto source with label @@grpc-proto+//:reflection_proto_deprecated should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//xds:envoy_service_discovery_v3_java_grpc: Proto source with label @@envoy_api+//envoy/service/discovery/v3:pkg should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//services:_reflection_v1_java_grpc: Proto source with label @@grpc-proto+//:reflection_proto should be in same package as consuming rule
DEBUG: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/java_grpc_library.bzl:84:14: in srcs attribute of @@grpc-java+//services:_health_java_grpc: Proto source with label @@grpc-proto+//:health_proto should be in same package as consuming rule
WARNING: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/services/BUILD.bazel:107:13: in java_library rule @@grpc-java+//services:reflection: target '@@grpc-java+//services:reflection' depends on deprecated target '@@grpc-proto+//:reflection_java_proto_deprecated': Use :reflection_java_proto instead
INFO: Analyzed 234 targets (1054 packages loaded, 26480 targets configured).
INFO: Found 179 targets and 55 test targets...
INFO: Writing explanation of rebuilds to '/home/vorburger/bazel-test-explain.txt'
INFO: From Building external/protobuf+/java/core/liblite_runtime_only.jar (94 source files):
external/protobuf+/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java:270: warning: [removal] AccessController in java.security has been deprecated and marked for removal
          AccessController.doPrivileged(
          ^
INFO: From Building external/protobuf+/java/core/liblite_runtime_only.jar (94 source files) [for tool]:
external/protobuf+/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java:270: warning: [removal] AccessController in java.security has been deprecated and marked for removal
          AccessController.doPrivileged(
          ^
INFO: From Compiling src/google/protobuf/compiler/java/internal_helpers.cc [for tool]:
external/protobuf+/src/google/protobuf/compiler/java/internal_helpers.cc: In lambda function:
external/protobuf+/src/google/protobuf/compiler/java/internal_helpers.cc:180:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<const google::protobuf::EnumValueDescriptor*, const google::protobuf::EnumValueDescriptor*> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  180 |           for (int i = 0; i < aliases.size(); i++) {
      |                           ~~^~~~~~~~~~~~~~~~
ERROR: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/xds/BUILD.bazel:97:18: Action external/grpc-java+/xds/envoy_service_discovery_v3_java_grpc-proto-gensrc.jar [for tool] failed: (Exit 1): protoc failed: error executing Action command (from target @@grpc-java+//xds:envoy_service_discovery_v3_java_grpc) bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/protobuf+/protoc '--plugin=protoc-gen-rpc-plugin=bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/grpc-java+/compiler/grpc_java_plugin' ... (remaining 5 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
F0000 00:00:1748122933.101682       3 helpers.cc:935] Check failed: nest_in_file_class != pb::JavaFeatures::NestInFileClassFeature::NEST_IN_FILE_CLASS_UNKNOWN Unknown value for nest_in_file_class feature. Try populating the Java feature set defaults in your generator plugin or custom descriptor pool.
*** Check failure stack trace: ***
    @           0x52ccf1  absl::lts_20250127::log_internal::LogMessage::SendToLog()
    @           0x52d389  absl::lts_20250127::log_internal::LogMessageFatal::~LogMessageFatal()
    @           0x405cdc  google::protobuf::compiler::java::NestedInFileClass()
    @           0x429e02  google::protobuf::compiler::java::ClassNameResolver::GetClassName[abi:cxx11]()
    @           0x429eb7  google::protobuf::compiler::java::ClassNameResolver::GetClassName[abi:cxx11]()
    @           0x426858  google::protobuf::compiler::java::ClassName[abi:cxx11]()
    @           0x41a933  java_grpc_generator::PrintMethodFields()
    @           0x423c9f  java_grpc_generator::GenerateService()
    @           0x425d8b  JavaGrpcGenerator::Generate()
    @           0x42a436  google::protobuf::compiler::CodeGenerator::GenerateAll()
    @           0x42b29e  google::protobuf::compiler::GenerateCode()
    @           0x42b684  google::protobuf::compiler::PluginMain()
    @           0x41638f  main
    @     0x7f1338e10248  __libc_start_call_main
    @     0x7f1338e1030b  __libc_start_main@GLIBC_2.2.5
    @           0x4167f5  _start
--rpc-plugin_out: protoc-gen-rpc-plugin: Plugin killed by signal 6.
ERROR: /home/vorburger/.cache/bazel/_bazel_vorburger/a3cf8df34f0c7a76e9926daaad9ffbf4/external/grpc-java+/xds/BUILD.bazel:16:13 Compiling Java headers external/grpc-java+/xds/libxds-hjar.jar (127 source files) and running annotation processors (AutoValueProcessor) [for tool] failed: (Exit 1): protoc failed: error executing Action command (from target @@grpc-java+//xds:envoy_service_discovery_v3_java_grpc) bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/protobuf+/protoc '--plugin=protoc-gen-rpc-plugin=bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/grpc-java+/compiler/grpc_java_plugin' ... (remaining 5 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
INFO: Elapsed time: 178.731s, Critical Path: 51.54s
INFO: 1618 processes: 1831 action cache hit, 452 internal, 1081 linux-sandbox, 85 worker.
ERROR: Build did NOT complete successfully

[vorburger]

FYI bazelisk clean --expunge does not help to fix this, it's still reproducible (for me) even after.