[xml] xmlReadFile Fails Where xmlParseFile Succeeds

[Paul Braman <bramankp gmail com>]

The following bit of code fails

xmlInitParser();

xmlDocPtr maindoc = xmlReadFile("maindoc.xml", NULL, 0);

xmlDocPtr subdoc = xmlReadFile("subdoc.xml", NULL, 0);

xmlNodePtr content = xmlDocGetRootElement(subdoc);

xmlUnlinkNode(content);

xmlAddChild(xmlDocGetRootElement(maindoc), content);

xmlFreeDoc(subdoc);

xmlFreeDoc(maindoc);

xmlCleanupParser();

with a crash upon calling xmlFreeDoc(maindoc) (problem freeing memory) where this code succeeds just fine and dandy

xmlInitParser();

xmlDocPtr maindoc = xmlParseFile("maindoc.xml");

xmlDocPtr subdoc = xmlParseFile("subdoc.xml");

xmlNodePtr content = xmlDocGetRootElement(subdoc);

xmlUnlinkNode(content);

xmlAddChild(xmlDocGetRootElement(maindoc), content);

xmlFreeDoc(subdoc);

xmlFreeDoc(maindoc);

xmlCleanupParser();

I understand I should use xmlReadFile instead of xmlParseFile. However, I can't figure on what's different between the two that could be causing the crash in the first block of code?

Note, I've tried with multiple versions, even 2.9.2.

Alternatively, how *should* I be structuring the code to do what I'm doing here? (I know a call to

xmlAddChild(xmlDocGetRootElement(maindoc), xmlCopyNode(xmlDocGetRootElement(subdoc), 1));

in place of the get/unlink/add sequence works but I'd like to understand why the code above fails.)

- Paul Braman