NameError from sample script

[alexv-anderson-uw]

I received the following error when running /samples/http_get_reply_iframes.json.sh

Traceback (most recent call last):
	12: from /usr/local/bin/dap:23:in `<main>'
	11: from /usr/local/bin/dap:23:in `load'
	10: from /var/lib/gems/2.5.0/gems/dap-1.2.6/bin/dap:121:in `<top (required)>'
	 9: from /var/lib/gems/2.5.0/gems/dap-1.2.6/bin/dap:121:in `each'
	 8: from /var/lib/gems/2.5.0/gems/dap-1.2.6/bin/dap:123:in `block in <top (required)>'
	 7: from /var/lib/gems/2.5.0/gems/dap-1.2.6/bin/dap:123:in `collect'
	 6: from /var/lib/gems/2.5.0/gems/dap-1.2.6/bin/dap:123:in `block (2 levels) in <top (required)>'
	 5: from /var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:66:in `process'
	 4: from /var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:66:in `each_pair'
	 3: from /var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:68:in `block in process'
	 2: from /var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:76:in `extract'
	 1: from /var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:76:in `each'
/var/lib/gems/2.5.0/gems/dap-1.2.6/lib/dap/filter/http.rb:79:in `block in extract': undefined local variable or method `urls' for #<Dap::Filter::FilterHTMLIframes:0x000055bee91ef700> (NameError)
Did you mean?  url