From: eregontp@... Date: 2020-09-25T14:31:44+00:00 Subject: [ruby-core:100148] [Ruby master Feature#17188] Freeze Encoding objects for Ractor Issue #17188 has been reported by Eregon (Benoit Daloze). ---------------------------------------- Feature #17188: Freeze Encoding objects for Ractor https://bugs.ruby-lang.org/issues/17188 * Author: Eregon (Benoit Daloze) * Status: Open * Priority: Normal * Target version: 3.0 ---------------------------------------- Currently Encoding objects are not frozen: ``` $ ruby -ve 'p Encoding::US_ASCII.frozen?' ruby 3.0.0dev (2020-09-25T08:28:42Z master 81dc37b1b4) [x86_64-linux] false ``` That means they cannot be accessed in a Ractor: ```ruby irb(main):001:0> Encoding::US_ASCII => # irb(main):002:0> Ractor.new { Encoding::US_ASCII } :38: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues. => # # terminated with exception (report_on_exception is true): (irb):2:in `block in irb_binding': can not access non-sharable objects in constant Encoding::US_ASCII by non-main Ractor. (NameError) ``` And `Ractor.new { p "".encoding }` is likely violating the Ractor guarantees. I think we can make all Encoding instances frozen. Making them frozen is also useful for code sharing, which TruffleRuby aims to support via the GraalVM Engine/Context API. cc @ko1 -- https://bugs.ruby-lang.org/ Unsubscribe: