From: "afurm (Andrii Furmanets) via ruby-core" <ruby-core@...>
Date: 2025-12-27T11:46:52+00:00
Subject: [ruby-core:124372] [Ruby Bug#21805] Wrong "key not found" in NoMatchingPatternKeyError when destructuring Data

Issue #21805 has been updated by afurm (Andrii Furmanets).


Thanks. The https://github.com/ruby/ruby/pull/15748 will fix the issue.

----------------------------------------
Bug #21805: Wrong "key not found" in NoMatchingPatternKeyError when destructuring Data
https://bugs.ruby-lang.org/issues/21805#change-115885

* Author: esad (Esad Hajdarevic)
* Status: Open
* ruby -v: ruby 4.0.0 (2025-12-25 revision 553f1675f3) +PRISM [arm64-darwin24]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN
----------------------------------------
Consider

```
Foo = Data.define(:x)
Foo.new(1) => {x:, z:}
```

It raises `#<data Foo x=1>: key not found: :x (NoMatchingPatternKeyError)`

Clearly the message is misleading, as it is key :z that is missing.



-- 
https://bugs.ruby-lang.org/
______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/