How to document singleton_class.attr_reader?

[UlyssesZh]

# A test class. 
class Test 
 
  # @!scope class 
  # @!attribute [r] test 
  # A test attribute. 
  singleton_class.attr_reader :test 
end

[error]: Exception occurred while generating 'Test.html'
[error]: NoMethodError: undefined method `[]' for nil
[error]: Stack trace:
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/html/attribute_details.erb:8:in `block (2 levels) in _erb_cache_24'
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/html/attribute_details.erb:6:in `each'
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/html/attribute_details.erb:6:in `each_with_index'
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/html/attribute_details.erb:6:in `block in _erb_cache_24'
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/setup.rb:155:in `block in scopes'
        /home/ulysses/.local/share/gem/ruby/3.3.0/gems/yard-0.9.37/templates/default/module/setup.rb:153:in `each'

Files:           1
Modules:         0 (    0 undocumented)
Classes:         1 (    0 undocumented)
Constants:       0 (    0 undocumented)
Attributes:      1 (    0 undocumented)
Methods:         1 (    0 undocumented)
 100.00% documented

[lsegal]

Please use the bug report template and fill in the required fields so we can properly triage this issue.

Edit: sorry I realize this is a discussion, this should be an issue if a bug is being reported.

[UlyssesZh]

OK. Will do now. I didn't open a bug report because I didn't consider this as a bug. I just presented what I tried to do and what didn't work.

Edit: opened #1582.