[ruby-core:123238] [Ruby Bug#21378] variable pinning does not look for method arguments
From:
"yui-knk (Kaneko Yuichiro) via ruby-core" <ruby-core@...>
Date:
2025-09-13 01:53:00 UTC
List:
ruby-core #123238
Issue #21378 has been updated by yui-knk (Kaneko Yuichiro).
> Do you think this is possible to implement?
This is possible to implement like [this](https://github.com/yui-knk/ruby/compare/f9bffff3d4b45d4c6fed42f13d556c520f3cfd67...ecde4c8227ac06ee56ff75cfcbf75102083685a6).
Let's discuss the detail in #21097.
----------------------------------------
Bug #21378: variable pinning does not look for method arguments
https://bugs.ruby-lang.org/issues/21378#change-114569
* Author: shyouhei (Shyouhei Urabe)
* Status: Feedback
* Assignee: matz (Yukihiro Matsumoto)
* ruby -v: ruby 3.5.0dev (2025-01-23T15:24:35Z origin/7ed08c4fd31.. 7ed08c4fd3) +PRISM [wasm32-wasi]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
Is this intentional?
```
irb(main):001> def x?(y, z) = y in { x: ^z }
<internal:kernel>:168:in 'Kernel#loop': (irb):1: syntax error found (SyntaxError)
> 1 | def x?(y, z) = y in { x: ^z }
| ^ z: no such local variable
from eval_async:132:in '<main>'
from /bundle/gems/js-2.7.1/lib/js.rb:109:in 'Kernel.eval'
from /bundle/gems/js-2.7.1/lib/js.rb:109:in 'block in JS.__eval_async_rb'
from /bundle/gems/js-2.7.1/lib/js.rb:120:in 'block in JS.__async'
```
--
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