Update mmtk-core and ruby repo revisions #149
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The upstream changed the way it handles objects with weak references. Now it registers objects that contain weak fields (notably `imemo::callcache`) upon creation. This allows MMTk (including the official MMTk binding) to handle such objects in a way similar to the current OpenJDK binding. We update the Rust part for this change.
The Ruby upstream changed its way to handle objects with weak references, and we have made changes in previous commits. In the ruby repo, we also fixed a few things that broke tests, such as the behavior of Process#warmup when using MMTk.
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The Ruby upstream changed its way to handle objects with weak
references, and we have made changes in previous commits.
In the ruby repo, we also fixed a few things that broke tests, such as
the behavior of Process#warmup when using MMTk.