Weird Kernel.autoload behavior #5466

Environment

Provide at least:

• JRuby version (jruby -v) and command line (flags, JRUBY_OPTS, etc)
  jruby 9.2.5.0-SNAPSHOT (2.5.0) 2018-11-22 93f0df3 OpenJDK 64-Bit Server VM 25.181-b13 on 1.8.0_181-8u181-b13-1ubuntu0.16.04.1-b13 +jit [linux-x86_64]
• Operating system and platform (e.g. uname -a)
  Ubuntu 16.04
  Linux max-u1604 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Problem

I expect Kernel.autoload :Hi, 'somefile' to do something useful. Right now, the only way found to trigger that autoload is do call .singleton_class::Hi on any class (It can be String, Object, etc). I really doubt there is any usecase for this.

In MRI, Kernel#autoload and Kernel.autoload always use the Module.nested of the calling context.

In JRuby, Kernel#autoload uses the object of the calling code. (This difference only shows up if the autoload call is in an instance method of a module, which is included in a class, and the method is called from an instance of the class.. Not something to worry about)

However, JRuby seems to special case Kernel.autoload weirdly. Looking at the code:

Ideally, Kernel.autoload would behave the same as calling Kernel#autoload.