Issue #21522 has been updated by andremuta (Andre Muta). Hi, I submitted a PR to fix this: https://github.com/ruby/ruby/pull/14940 ---------------------------------------- Bug #21522: Accessing outer locals via eval in a Ractor returns false https://bugs.ruby-lang.org/issues/21522#change-114918 * Author: tenderlovemaking (Aaron Patterson) * Status: Open * Assignee: ractor * ruby -v: ruby 3.5.0dev (2025-07-28T22:17:45Z master f1acf47ca2) +PRISM [arm64-darwin24] * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- Normally, if you try to access a local that's been defined outside the scope of the Ractor block, it'll raise an ArgumentError. However, if you try to access the local via `eval` it will return the value `false`. ```ruby foo = Object.new begin Ractor.new { p foo }.value rescue ArgumentError end Ractor.new { p eval("foo") # => false }.value ``` I'm not sure how we fix this, since my guess is that we zero the environment when copying, but I wanted to file the issue so we can track it. -- https://bugs.ruby-lang.org/