[ruby-core:124028] [Ruby Bug#21764] encoding of warning for depreciated global variables is not set

4 Dec 2025


      Issue #21764 has been reported by nobu (Nobuyoshi Nakada).

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Bug #21764: encoding of warning for depreciated global variables is not set
https://bugs.ruby-lang.org/issues/21764

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* ruby -v: 68a7edaa81
* Backport: 3.2: REQUIRED, 3.3: REQUIRED, 3.4: REQUIRED
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The aliased name should be encoded properly.

```console
$ ruby -v -e 'def Warning.warn(s) = p(s, s.encoding); alias $分行 $/; $分行 = "\n"'
ruby 4.0.0dev (2025-11-27T12:05:45Z master 68a7edaa81) +PRISM [arm64-darwin25]
"-e:1: warning: '$\xE5\x88\x86\xE8\xA1\x8C' is deprecated\n"
#<Encoding:BINARY (ASCII-8BIT)>
```


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