Feature #22135: Remove obsolete `ObjectSpace#_id2ref`

• Status: Closed
• Assignee: -
• Target version: -

[nobu (Nobuyoshi Nakada)]

As a result of [Feature #15408], the ObjectSpace#_id2ref method has been deprecated and now triggers a warning.
However, we recognize that its use had already been discouraged for a long time prior to this, and we believe it is rarely used nowadays.
Are there any objections to removing this method in version 4.1?

GH-17577

[nobu (Nobuyoshi Nakada)]

• Subject changed from Remove deprecated `ObjectSpace#_id2ref` to Remove obsolete `ObjectSpace#_id2ref`

[byroot (Jean Boussier)]

👍 this is a lot of complex and error prone code to support a deprecated feature. Very little gems ever used _id2ref and nowadays it's always advantageously replaced by a WeakMap.

[jhawthorn (John Hawthorn)]

+1 I would love to see this gone, we have to do a fair bit of work in the GC and elsewhere to maintain the id2ref table.

[ko1 (Koichi Sasada)]

+1

[Eregon (Benoit Daloze)]

+1

[eightbitraptor (Matt V-H)]

+1

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|df0622320bbd9a7c345e36e1b0730f25bc6a016b.

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[Feature #22135] Remove obsolete ObjectSpace._id2ref

[matz (Yukihiro Matsumoto)]

Accepted.

_id2ref has been deprecated and it is fundamentally incompatible with the direction of the runtime (GC and Ractor). Reviving arbitrary objects from integer IDs was never a sound API. Let us remove it.

Matz.

[headius (Charles Nutter)]

I am very happy to see this go. Thanks everyone!