From: "nobu (Nobuyoshi Nakada)" <noreply@...>
Date: 2022-06-14T03:43:04+00:00
Subject: [ruby-core:108890] [Ruby master Bug#18827] `__ENCODING__` is not set to the source encoding when saving script lines

Issue #18827 has been updated by nobu (Nobuyoshi Nakada).


https://github.com/ruby/ruby/pull/6015

----------------------------------------
Bug #18827: `__ENCODING__` is not set to the source encoding when saving script lines
https://bugs.ruby-lang.org/issues/18827#change-97968

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Backport: 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED
----------------------------------------
`__ENCODING__` should respect the encoding of the given source code.
```shell-session
$ ruby -Ke -e 'p __ENCODING__'
#<Encoding:EUC-JP>
```
```ruby
p eval("__ENCODING__".encode("euc-jp")) #=> #<Encoding:EUC-JP>
```

But it is ignored when `SCRIPT_LINES__` is set.
```shell-session
$ cat script_lines.rb
SCRIPT_LINES__ = {}

$ ruby -r./script_lines.rb -Ke -e 'p __ENCODING__'
#<Encoding:UTF-8>
```

Also similar when `keep_script_lines` is true.

```ruby
pp RubyVM::AbstractSyntaxTree.parse("__ENCODING__".encode("euc-jp"), keep_script_lines: true)
#=> (SCOPE@1:0-1:12 tbl: [] args: nil body: (LIT@1:0-1:12 #<Encoding:UTF-8>))
```




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