fix memory leaks #2345
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fix memory leaks #2345
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in xml_xpath_context.c, both functions `evaluate` and `Nokogiri_marshal_xpath_funcall_and_return_values` had code to convert xpath objects to Ruby objects. `Nokogiri_marshal_xpath_funcall_and_return_values` had a memory leak while `evaluate` did not. I've extracted this logic to a single method, and called it from both places, thereby eliminating the memory leak along with DRYing things up. Also, I've added a bit of test coverage to some of the marshalling.
- namespaces array was not being freed - argument type errors led to output buffer not being freed Also note that I cleaned up this function a bit.
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What problem is this PR intended to solve?
Playing with ruby_memcheck led to finding a few easy-to-fix memory leaks.
Document#canonicalizeleaked the namespaces arrayDocument#canonicalizeleaked the output buffer when argument type errors were raisedHave you included adequate test coverage?
#2344 is a parallel effort to automate the leak checking that I ran on the existing test suite to find these.