Memory leak in path method

[vovanmozg]

ruby 3.0.0
libxml-ruby: 3.2.1
libxml: 2.9.10
Debian 11

I added demo (using linux ps to measure memory consumption)
https://github.com/vovanmozg/libxml-ruby/blob/cf1cd5cd53d05f6af7f90c8b2ccb879f5c140f19/test/test_xpath.rb#L171-L178

def test_path_memory
 node = LibXML::XML::Node.new('node')
 p `ps -o rss= -p #{Process.pid}`.to_f
 1000000.times do
   node.path
 end
 p `ps -o rss= -p #{Process.pid}`.to_f
end

path implementation:

libxml-ruby/ext/libxml/ruby_xml_node.c

Line 982 in 020367b

static VALUE rxml_node_path(VALUE self)

[vovanmozg]

Please, take a look at the quick solution
vovanmozg@5206247

[cfis]

That looks good - since you have the code already want to send in a pull request? Otherwise I can do it by hand.

[vovanmozg]

I going to do some tests on my project and than to send in a pull request.

[cfis]

Sounds good - thanks.

[vovanmozg]

#180