From: nagachika00@...
Date: 2021-07-03T04:49:59+00:00
Subject: [ruby-dev:51076] [Ruby master Bug#12052] String#encode with xml option returns wrong result for totally non-ASCII-compatible encodings

Issue #12052 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.7: REQUIRED, 3.0: REQUIRED to 2.7: REQUIRED, 3.0: DONE

ruby_3_0 e62cccaeb0986d43480bccbd365cb20056bda4d7 merged revision(s) e86c1f6fc53433ef5c82ed2b7a4cc9a12c153e4c,f6539202c52a051a4e6946a318a1d9cd29002990.

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Bug #12052: String#encode with xml option returns wrong result for totally non-ASCII-compatible encodings
https://bugs.ruby-lang.org/issues/12052#change-92741

* Author: nobu (Nobuyoshi Nakada)
* Status: Closed
* Priority: Normal
* Assignee: akr (Akira Tanaka)
* Backport: 2.7: REQUIRED, 3.0: DONE
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`String#encode`をASCII非互換エンコーディングから同じエンコーディングへ、`xml:`オプション付きで呼ぶとおかしな結果を返します。
バイナリとして変換してしまっているようです。

```ruby
p "<\0>\0".encode("utf-16le", "utf-16le", xml: :text)
#=> "\u6C26\u3B74\u2600\u7467;"
```



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