Unknown encoding name is displayed

Installing Ruby from rubyinstaller-devkit-2.7.2-1-x64 and running ruby-v displays the following:

 ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x64-mingw32]

However, if you try to do anything else (such as installing a gem), the following message appears:

Traceback (most recent call last): ruby.exe:unknown encoding name-
utf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-U
(RuntimeError)

During Ruby installation, "use utf-8 as default~" was checked and installed.

What's the problem?Please let me know if there is a solution.

The PC is window 10,64bit.

ruby windows

2022-09-30 20:16

1 Answers

This is not a Ruby or Gem issue you tried to install.

 C:\>set RUBYOPT=-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-U

C:\>ruby-v
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x64-mingw32]

C:\>ruby
Traceback (most recent call last):
ruby —unknown encoding name-utf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-Eutf-8;-U (RuntimeError)

For some reason, I think that the PC had an incorrect RUBYOPT environment variable.

2022-09-30 20:16

If you have any answers or tips

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