Include the method owner in backtraces

[mame]

$ cat test.rb
def toplevel = raise

class Foo
  def self.class_meth = toplevel

  def instance_meth = Foo.class_meth
end

obj = Foo.new

def obj.singleton_meth = instance_meth

obj.singleton_meth

$ ./miniruby test.rb
test.rb:1:in `Object#toplevel': unhandled exception
        from test.rb:4:in `Foo.class_meth'
        from test.rb:6:in `Foo#instance_meth'
        from test.rb:11:in `singleton_meth'
        from test.rb:13:in `<main>'

https://bugs.ruby-lang.org/issues/19117

[github-actions]

Try on Playground: https://ruby.github.io/play-ruby?run=7913922561
This is an automated comment by pr-playground.yml workflow.