[ruby-core:93718] [Ruby master Bug#15993] 'require' doesn't work if there are Cyrillic chars in the path to Ruby dir

Issue #15993 has been updated by inversion (Yura Babak).


Looks like there is an **ugly workaround** .

1)	Ensure to do `chcp 1251` in current console session.
2)	Run Ruby with an option `--disable=gems` so it will not fail initially.
3)	Add next code at the very beginning of a script:

``` ruby
if $:[0].encoding.name == 'Windows-1251'
	$:.each {|path| path.encode! 'UTF-8' }
	$:.push '.'    # somehow it helps, looks like a modification of array is needed
	require 'rubygems'
end
```


This helped me to overcome the problem and run my script from folder with Cyrillic and spaces in the path.

But it definitely should not be fixed.


----------------------------------------
Bug #15993: 'require' doesn't work if there are Cyrillic chars in the path to Ruby dir
https://bugs.ruby-lang.org/issues/15993#change-79351

* Author: inversion (Yura Babak)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.3p62 (2019-04-16 revision 67580) [x64-mingw32]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I’m trying to build a cross-platform portable application with Ruby onboard and there is a problem on Windows. 
A user usually installs it to the Roaming folder which sits inside a user folder which can often have not a Latin name or contain spaces). 
When there is a Cyrillic character (maybe just not Latin) in the path — require of any gem doesn’t work:

```
D:\users\киї\Ruby\2.6\bin>ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [x64-mingw32]

D:\users\киї\Ruby\2.6\bin>ruby -e "require 'logger'"
Traceback (most recent call last):
        1: from <internal:gem_prelude>:2:in `<internal:gem_prelude>'
<internal:gem_prelude>:2:in `require': No such file or directory -- D:/users/РєРёС—/Ruby/2.6/lib/ruby/2.6.0/rubygems.rb (LoadError)

D:\users\киї\Ruby\2.6\bin>ruby --disable=rubyopt -e "require 'logger'"
Traceback (most recent call last):
        1: from <internal:gem_prelude>:2:in `<internal:gem_prelude>'
<internal:gem_prelude>:2:in `require': No such file or directory -- D:/users/РєРёС—/Ruby/2.6/lib/ruby/2.6.0/rubygems.rb (LoadError)

D:\users\киї\Ruby\2.6\bin>gem list
Traceback (most recent call last):
        1: from <internal:gem_prelude>:2:in `<internal:gem_prelude>'
<internal:gem_prelude>:2:in `require': No such file or directory -- D:/users/РєРёС—/Ruby/2.6/lib/ruby/2.6.0/rubygems.rb (LoadError)

```

We can see such encoding transformations in the output:

```
киї (utf-8) == РєРёС— (win1251)
```

I have an old Ruby installation that works fine:

```
D:\users\киї\Ruby\2.0\bin>ruby -e "require 'logger'"

D:\users\киї\Ruby\2.0\bin>ruby -v
ruby 2.0.0p451 (2014-02-24) [i386-mingw32]
```
The same is for `ruby 2.0.0p643 (2015-02-25) [i386-mingw32]` .

I also checked that require fails in the same case for
`ruby 2.1.9p490 (2016-03-30 revision 54437) [i386-mingw32]`



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