Ruby

[ruby/mmtk] Use rb_mmtk_gc_thread_bug for rb_mmtk_call_object_closure

https://github.com/ruby/mmtk/commit/308936296a

[ruby/mmtk] Propagate crash of GC thread to mutator thread

This allows the mutator thread to dump its backtrace when a GC thread crashes.

https://github.com/ruby/mmtk/commit/40ff9ffee7

Convert Queue and SizedQueue to rb builtin

A large part of thread_sync.c was migrated already, might as well
go all the way. It also allow to remove a bunch of Rdoc commands.

[ruby/mmtk] Check for T_NONE during marking

https://github.com/ruby/mmtk/commit/c3e338bb25

[ruby/mmtk] Assert target is not pinned during normal tracing

https://github.com/ruby/mmtk/commit/58210c88ed

Add a test case for complex argument forward reference

Using eval it's possible to reference a later argument, and
this requires careful initialization of the stack.

Skip initializing optional arguments to nil

They are optional because they have a default value, so I don't
understand why we'd need to initialize them to nil.

Register a dupped identity hash as pinning

Speedup Queue initialization

Rather than to push items one by one we can directly memcpy.

[ruby/rubygems] Bump the rb-sys group across 2 directories with 1 update

Bumps the rb-sys group with 1 update in the /test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib directory: rb-sys.
Bumps the rb-sys group with 1 update in the /test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example directory: rb-sys....