From: "znz (Kazuhiro NISHIYAMA)" <noreply@...>
Date: 2022-07-02T06:11:08+00:00
Subject: [ruby-core:109116] [Ruby master Bug#18892] ARGF.lineno starts from 2 when the file has shebang

Issue #18892 has been reported by znz (Kazuhiro NISHIYAMA).

----------------------------------------
Bug #18892: ARGF.lineno starts from 2 when the file has shebang
https://bugs.ruby-lang.org/issues/18892

* Author: znz (Kazuhiro NISHIYAMA)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.4p208 (2022-04-12 revision 3fa771dded) [aarch64-linux], ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [aarch64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
Since ruby 3.0, `ARGF.lineno` starts from 2 if the file has shebang.

Following example has `#!/usr/bin/env ruby`, and it can reproduce with the file has `#!` only.

```
$ cat f.rb
#!/usr/bin/env ruby
ARGF.each do
  p ARGF.lineno
  exit
end
$ RBENV_VERSION=3.1.2 ruby -v f.rb f.rb
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [aarch64-linux]
2
$ RBENV_VERSION=3.0.4 ruby -v f.rb f.rb
ruby 3.0.4p208 (2022-04-12 revision 3fa771dded) [aarch64-linux]
2
$ RBENV_VERSION=2.7.6 ruby -v f.rb f.rb
ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [aarch64-linux]
1
```




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