[ruby-core:122883] [Ruby Bug#21522] Accessing outer locals via eval in a Ractor returns false
From:
"tenderlovemaking (Aaron Patterson) via ruby-core" <ruby-core@...>
Date:
2025-07-30 23:25:20 UTC
List:
ruby-core #122883
Issue #21522 has been reported by tenderlovemaking (Aaron Patterson).
----------------------------------------
Bug #21522: Accessing outer locals via eval in a Ractor returns false
https://bugs.ruby-lang.org/issues/21522
* 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/
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