$ RuntimeError.exception fails

[kyrylo]

[7] pry(main)> $ RuntimeError.exception                                                                                                                                                           
NoMethodError: undefined method `each_with_index' for nil:NilClass
from /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/code.rb:91:in `initialize'
[7] pry(main)> wtf
Exception: NoMethodError: undefined method `each_with_index' for nil:NilClass
--
0: /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/code.rb:91:in `initialize'
1: /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/commands/show_source.rb:42:in `new'
2: /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/commands/show_source.rb:42:in `content_for'
3: /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/commands/show_info.rb:106:in `header'
4: /home/kyrylo/.gem/ruby/2.2.2/gems/pry-0.10.1/lib/pry/commands/show_info.rb:75:in `content_and_header_for_code_object'

NOTE: show-doc works fine.

[egwspiti]

[1] pry(main)> YARD::Registry.at("Exception.exception").source
=> nil
[2] pry(main)> YARD::Registry.at("Exception.exception").docstring
=> "call-seq:\n   exc.exception(string)  ->  an_exception or exc\n\nWith no argument, or if the argument is the same as the receiver,\nreturn the receiver. Otherwise, create a new\nexception object of the same class as the receiver, but with a\nmessage equal to <code>string.to_str</code>."

I think Pry wrongly assumes that if a docstring can be located, a source can be located too.