Error while generating docs for ox

[Kapeli]

~/Desktop/ox-2.1.1 » yard --backtrace
[warn]: Unknown tag @column in file `lib/ox/sax.rb` near line 52
[error]: Unhandled exception in YARD::Handlers::C::ClassHandler:
[error]:   in `ext/ox/sax_as.c`:245:

    245: ox_sax_value_class = rb_define_class_under(sax_module, "Value", rb_cObject);

[error]: NoMethodError: undefined method `root?' for nil:NilClass
[error]: Stack trace:
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/base.rb:561:in `ensure_loaded!'
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/base.rb:428:in `register_ensure_loaded'
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/base.rb:407:in `block in register'
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/base.rb:405:in `each'
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/base.rb:405:in `register'
    /Library/Ruby/Gems/2.0.0/gems/yard-0.8.7.3/lib/yard/handlers/c/handler_methods.rb:11:in `handle_class'

Files:          15
Modules:         2 (    0 undocumented)
Classes:        15 (    2 undocumented)
Constants:       1 (    0 undocumented)
Methods:        30 (    1 undocumented)
 93.75% documented

[lsegal]

I've made a slight change to the above fix to report these issues as undocumentable errors (warnings, really) instead. It turns out that the way Ox defines that Value class is done in such a way that confuses YARD about what the parent module/class is. Ideally we should report these so libraries like Ox can redefine or give extra hints to YARD/RDoc to declare the class properly (RDoc can't find this class either).