[ruby-core:120709] [Ruby master Bug#21021] "try to mark T_NONE object" with 3.4.1

["Benoit_Tigeot (Benoit Tigeot) via ruby-core" <ruby-core@ml.ruby-lang.org>]

Issue #21021 has been updated by Benoit_Tigeot (Benoit Tigeot).


tenderlovemaking (Aaron Patterson) wrote in #note-8:
> Do you know if any of the code in your Ruby level backtrace are using WeakMaps?

I see no matching between the two
```
~/.rbenv/versions/3.4.1/lib/ruby/gems/3.4.0/gems ❯ rg WeakMap -g '*.rb' --max-count 1
debug-1.10.0/lib/debug/source_repository.rb
32:        @cmap = ObjectSpace::WeakMap.new

bundler-2.6.2/lib/bundler/vendor/connection_pool/lib/connection_pool.rb
49:    INSTANCES = ObjectSpace::WeakMap.new

connection_pool-2.5.0/lib/connection_pool.rb
49:    INSTANCES = ObjectSpace::WeakMap.new

activerecord-7.2.2.1/lib/active_record/connection_adapters/pool_config.rb
16:      INSTANCES = ObjectSpace::WeakMap.new

activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/transaction.rb
190:          @lazy_enrollment_records ||= ObjectSpace::WeakMap.new

mustermann-3.0.3/lib/mustermann/equality_map.rb
3:[Omitted long line with 1 matches]

sorbet-runtime-0.5.11751/lib/types/types/typed_array.rb
32:          ObjectSpace::WeakMap.new[1] = 1

sorbet-runtime-0.5.11751/lib/types/types/typed_class.rb
50:            ObjectSpace::WeakMap.new[1] = 1

sorbet-runtime-0.5.11751/lib/types/types/simple.rb
81:          ObjectSpace::WeakMap.new[1] = 1

activesupport-7.2.2.1/lib/active_support/descendants_tracker.rb
18:      # On MRI `ObjectSpace::WeakMap` keys are weak references.

drb-2.2.1/lib/drb/weakidconv.rb
17:        @map = ObjectSpace::WeakMap.new
```

Thanks Alan for the detailed guide. I was able to use `YJIT dev`, get a crash but the output seems to be quite similar at first sight. I have a valid version
```
$ ruby --yjit -v
ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +YJIT dev +PRISM [x86_64-linux]
```

Here is a dump https://gist.github.com/benoittgt/74d83534b9a2d8837d643cdcad318367

Thanks 


----------------------------------------
Bug #21021: "try to mark T_NONE object" with 3.4.1
https://bugs.ruby-lang.org/issues/21021#change-111543

* Author: Benoit_Tigeot (Benoit Tigeot)
* Status: Open
* ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +YJIT +PRISM [x86_64-linux]                                                                                                                                  │
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
Hello

We upgraded to 3.4.1 yesterday but we are seeing crash since then.

```
/bundle/ruby/3.4.0/gems/activejob-7.2.2.1/lib/active_job/enqueuing.rb:93: [BUG] try to mark T_NONE object
```

I saw the other issue related to ffi gem https://bugs.ruby-lang.org/issues/20694

But in our case the `C level backtrace information` looks different.

https://gist.github.com/benoittgt/13507c2000281aa7740bc782adab68c5


We migrated this part of the code to parallel->concurrent-ruby and we do not see the error yet again but I am a little bit worried we could see the issue again. 



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