From: eregontp@... Date: 2020-11-26T14:53:53+00:00 Subject: [ruby-core:101097] [Ruby master Feature#17322] Deprecate `Random::DEFAULT` and introduce `Random.default()` method to provide Ractor-supported default random generator Issue #17322 has been updated by Eregon (Benoit Daloze). Sounds great, except: ko1 (Koichi Sasada) wrote in #note-8: > * `Random.seed()` is added to return current seed of per-ractor default random generator. Is this needed? It sounds very bad practice from a security point of view to ever be able to read the seed directly (without also changing it at the same time like `srand`). ---------------------------------------- Feature #17322: Deprecate `Random::DEFAULT` and introduce `Random.default()` method to provide Ractor-supported default random generator https://bugs.ruby-lang.org/issues/17322#change-88774 * Author: ko1 (Koichi Sasada) * Status: Open * Priority: Normal ---------------------------------------- `Random::DEFAULT` a default random generator used by `rand`, `srand`, `Array#shuffle` without a given random generator, and so on. Random generators are not thread-safe, so they are not ractor safe, and they are not shareable. So a program refer to `Random::DEFAULT` on non-main ractor, it causes an error. To provide per-ractor default random generator, this ticket propose the `Random.default()` method which returns per-ractor random generator. `Random::DEFAULT` is a result of `Random.default()` on main-ractor and it should be deprecated, or at least it should not be used on multi-ractor supporting apps and libraries. -- https://bugs.ruby-lang.org/ Unsubscribe: