Allow Method objects to be Ractor shareable #12978
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This is built on top of #12977 (itself just a rebase of #7182). The last commit, bbad067, has the noteable change.
This makes Method objects shareable via
Ractor.make_shareable
, with similar semantics to making iseq procs shareable. That is, it will only be made shareable if the receiver is already frozen/shareable, otherwise it will raiseRactor::IsolationError
.I'll file a redmine ticket, since the behaviour deserves to be discussed.