Alias method loaded from cache throws `NoMethodError` on `inspect`

[4lllex]

Example:

driver = RDoc::RI::Driver.new
array_append = driver.stores.first.load_method("Array", "#append")

p array_append
# rdoc (7.2.0) lib/rdoc/code_object/method_attr.rb:299:in 'RDoc::MethodAttr#inspect': undefined method 'name' # for an instance of Array (NoMethodError)
#
#    alias_for = @is_alias_for ? " (alias for #{@is_alias_for.name})" : nil
#                                                            ^^^^^

pp array_append
# => [RDoc::AnyMethod Array#append public alias for push comment: #<RDoc::Comment:24b0 array.c "">]

rdoc/lib/rdoc/code_object/method_attr.rb

Lines 299 to 301 in bb8b2d4

	def inspect # :nodoc:
	alias_for = @is_alias_for ? " (alias for #{@is_alias_for.name})" : nil
	visibility = self.visibility

rdoc/lib/rdoc/code_object/method_attr.rb

Lines 346 to 352 in bb8b2d4

	def pretty_print(q) # :nodoc:
	alias_for =
	if @is_alias_for.respond_to? :name then
	"alias for #{@is_alias_for.name}"
	elsif Array === @is_alias_for then
	"alias for #{@is_alias_for.last}"
	end