Ruby Issue Tracking System

Today

12:14 AM Ruby Feature #21795: Methods for retrieving ASTs

I asked Codex to analyze how stable are `node_id` across Prism versions and the answer is it's not stable:
https://gist.github.com/eregon/469e40f447f6edac813a389e7f3f4832
One interesting fact is that `node_id` tracks the internal nod... Eregon (Benoit Daloze)

07/24/2026

11:35 PM Ruby Feature #21795: Methods for retrieving ASTs

From our discussion with @mame and @matz at RubyKaigi in Hakodate, I recall Matz said if we add `#ast`/`#syntax_tree` and that returns a `Prism::Node`, then `prism` should define that method.
And given we already have `Prism.find`, that... Eregon (Benoit Daloze)

10:19 PM Ruby Feature #22212 (Open): Add Thread::Backtrace::Location#source_range

## Motivation
The main motivation is to be able to implement `Prism.find(Thread::Backtrace::Location)` precisely and cleanly on any Ruby implementation,
in a way which does not depend on implementation details like `node_id`.
For th... Eregon (Benoit Daloze)

01:25 PM Ruby Bug #22197: Backtraces show methods which do not exist

PR is ready: https://github.com/ruby/ruby/pull/17963
Would appreciate some reviews :)
---
sophiathedev (Nguyen Thang) wrote in #note-2:
> This is my first time contributing to Ruby core. I've submitted a PR to fix this issue here... Eregon (Benoit Daloze)

07/23/2026

09:11 PM Ruby Feature #21826: Deprecating RubyVM::AbstractSyntaxTree

Documentation-only PR for this: https://github.com/ruby/ruby/pull/18042 Eregon (Benoit Daloze)

08:58 PM Ruby Feature #21795: Methods for retrieving ASTs

mame (Yusuke Endoh) wrote in #note-27:
> That said, it is also an unshakable fact that perfect behavior is hard to guarantee with a different version of prism.
Yes, as I have shown above it is incorrect in some cases and as more time... Eregon (Benoit Daloze)

07/18/2026

09:26 PM Ruby Bug #22200: ObjectSpace._id2ref can return a different object than the id's owner on Ruby 4.0 (stale id2ref_tbl entry for objects with generic fields)

nobu (Nobuyoshi Nakada) wrote in #note-1:
> `ObjectSpace._id2ref` does not guarantee the reference to the object, so it can happen of course.
There is clear regression here in Ruby 4.0, before `ObjectSpace._id2ref` was safe and would... Eregon (Benoit Daloze)

07/16/2026

12:31 PM Ruby Feature #15408: Deprecate ObjectSpace._id2ref

Update: `ObjectSpace._id2ref` has been removed on master / for Ruby 4.1! Eregon (Benoit Daloze)

07/15/2026

04:02 PM Ruby Bug #22197: Backtraces show methods which do not exist

In CRuby implementation terms we'd get the original method module with something like:
```c
const rb_callable_method_entry_t *me = cme;
// (1) unwrap an explicit alias entry, if present
while (me->def->type == VM_METHOD_TYPE_ALIAS) {
m... Eregon (Benoit Daloze)

03:58 PM Ruby Bug #22197 (Open): Backtraces show methods which do not exist

```ruby
class Parent
def original
puts caller_locations(0), nil
end
end
class Child < Parent
alias_method :alias, :original
end
Child.new.alias
module Original
def original
puts caller_locations(0)
en... Eregon (Benoit Daloze)