Missing error diagnostics using Bazel (for Scala 2.x)

[Aish]

Describe the bug

Error diagnostics aren't showing when using Bazel and Metals. This time though for Scala 2.12 (I see the other issue for Scala3 but I presume that's a separate issue).

Expected behavior

No response

Operating system

Linux

Editor/Extension

VS Code

Version of Metals

v1.2.2

Extra context or search terms

See this in the metals.log:

2024.04.05 23:53:46 INFO  INFO: Found 1 target...�[0m
2024.04.05 23:53:46 INFO  checking cached actions�[0m
2024.04.05 23:53:46 INFO  [0 / 2] [Prepa] BazelWorkspaceStatusAction stable-status.txt�[0m
2024.04.05 23:53:46 INFO  [1 / 2] scala @//.../netflix/aeviz/service:service; 0s remote-cache, worker�[0m
2024.04.05 23:53:47 INFO  ERROR: /home/coder/rankresearchv2/aeviz/src/main/scala/com/netflix/aeviz/service/BUILD.bazel:10:14: scala @//aeviz/src/main/scala/com/netflix/aeviz/service:service failed: (Exit 1): scalac failed: error executing command (from target //aeviz/src/main/scala/com/netflix/aeviz/service:service) bazel-out/k8-opt-exec-2B5CBBC6/bin/external/io_bazel_rules_scala/src/java/io/bazel/rulesscala/scalac/scalac '--jvm_flag=-DNetflixInvalidateCacheArg=20220508' '--jvm_flag=-Xss2m' '--jvm_flag=-Xmx2g' ... (remaining 1 argument skipped)�[0m
2024.04.05 23:53:47 INFO  aeviz/src/main/scala/com/netflix/aeviz/service/RankService.scala:49: error: not found: value asfd�[0m
2024.04.05 23:53:47 INFO  asfd�[0m
2024.04.05 23:53:47 INFO  ^�[0m
2024.04.05 23:53:47 INFO  aeviz/src/main/scala/com/netflix/aeviz/service/RankService.scala:87: warning: local val seed in method applyOrElse is never used�[0m
2024.04.05 23:53:47 INFO  val seed = s.getOrElse(defaultSeed)�[0m
2024.04.05 23:53:47 INFO  ^�[0m
2024.04.05 23:53:47 INFO  aeviz/src/main/scala/com/netflix/aeviz/service/RankService.scala:113: warning: local val seed in method applyOrElse is never used�[0m
2024.04.05 23:53:47 INFO  val seed = s.getOrElse(defaultSeed)�[0m
2024.04.05 23:53:47 INFO  ^�[0m
2024.04.05 23:53:47 INFO  aeviz/src/main/scala/com/netflix/aeviz/service/RankService.scala:134: warning: local val seed in method applyOrElse is never used�[0m
2024.04.05 23:53:47 INFO  val seed = s.getOrElse(defaultSeed)�[0m
2024.04.05 23:53:47 INFO  ^�[0m
2024.04.05 23:53:47 INFO  three warnings found�[0m
2024.04.05 23:53:47 INFO  one error found�[0m
2024.04.05 23:53:47 INFO  Build failed�[0m
2024.04.05 23:53:47 INFO  java.lang.RuntimeException: Build failed�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.scalac.ScalacInvoker.invokeCompiler(ScalacInvoker.java:53)�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.scalac.ScalacWorker.compileScalaSources(ScalacWorker.java:253)�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.scalac.ScalacWorker.work(ScalacWorker.java:69)�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.worker.Worker.persistentWorkerMain(Worker.java:86)�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.worker.Worker.workerMain(Worker.java:39)�[0m
2024.04.05 23:53:47 INFO  at io.bazel.rulesscala.scalac.ScalacWorker.main(ScalacWorker.java:33)�[0m

[Tomasz Godzik]

Thanks for reporting! Did this happen before, were there any changes to bazel/rules-scala versions?

[Aish]

First time I've got this far (a couple of previous, now resolved, bazel-bsp issues meant we hadn't got past import until now).

[Tomasz Godzik]

Hmm... does this happen for you on some sample Bazel repos or only in yours? Are you able to provide the versions of Bazel rules-scala and bazel-bsp versions you are using?

[Aish]

We're using Scala 2.12.18, Bazel 6.3.2, rules_scala 6.4.0 and nightly build of Metals 1.2.2+99-c0e45169-SNAPSHOT (can update to a newer nightly if that helps?)

[Tomasz Godzik]

Looks like this might be related to JetBrains/bazel-bsp#547 (comment)

Some diagnostics are sent with progress, which is not read by Bazel BSP. We can confirm once the fix is merged.