6.2.0: Unexpected output "Unknown constant: 11"

[joeljeske]

Description of the bug:

After upgrading to 6.2.0, I am seeing many messages in build log that do not seem possible when reading the source code:

(02:31:14) INFO: From Extracting interface //my_target:my_target_with_header:
--
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.
  | Unknown constant: 11. Passing class through.

This is the default case for https://github.com/bazelbuild/bazel/blob/release-6.2.0/third_party/ijar/classfile.cc#L1660-L1662
however the switch should have a case for constant 11 https://github.com/bazelbuild/bazel/blob/release-6.2.0/third_party/ijar/classfile.cc#L1593.

I am wanting to understand this error to see if there is anything I need to change on my end, or if its a bug here.

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

https://github.com/joeljeske/bazel-repo-iss18360

Which operating system are you running Bazel on?

Linux, and darwin

What is the output of bazel info release?

release 6.2.0

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 master; git rev-parse HEAD ?

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

[sgowroji]

Hi @joeljeske, Can you provide minimal steps followed to reproduce this issue. Thanks!

[joeljeske]

Hey @sgowroji I'm working towards a minimal reproduction, but have been debugging along the way.

Currently, HEAD of rules_java is referencing remote_java_tools v12.1, which supplies pre-built ijar binaries that should not be able to log this message according to ijar source code.

I am unable to traceback to the source code that built these binaries, as its not contained in the bazelbuild/java_tools repo itself. If I upgrade to 12.2 by specifying my own remote_java_tools in my WORKSPACE, then this message no longer appears. Edit: I was incorrect, I do experience this error with every version of java_tools/ijar. I think there may be something incorrect about origin of java_tools prebuilt binaries.

[joeljeske]

@sgowroji Alright, here is a minimum reproduction! Its pretty simple and it does not occur in 6.1.0.

https://github.com/joeljeske/bazel-repo-iss18360

[joeljeske]

Another realization: The message Unknown constant: 11. Passing class through. is printing a hexadecimal number 11, not the decimal number 17. This is why the message is printing in the first place. But I still do not know why this symbol is appearing 🤔