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Wont parse big xml files.

See original GitHub issue

Checklist

Are you running the latest version? (3.12.5)
Have you checked if you are using correct configuration? (Different configurations, including the default one wont work)
Did you try online tool? (Not working either)

Input

This file: https://raw.githubusercontent.com/gtk-rs/gir-files/master/GLib-2.0.gir

Code

const fs = require('fs')
const xmlData = fs.readFileSync('GLib-2.0.gir').toString()
const tObj = fastXmlParser.getTraversalObj(xmlData)

Output

Browser:

xmlNode.js:11 Uncaught TypeError: this.child[t.tagname].push is not a function
    at t.exports.addChild (xmlNode.js:11)
    at Object.e.getTraversalObj (xmlstr2xmlnode.js:90)
    at Object.e.parse (parser.js:10)
    at HTMLButtonElement.<anonymous> ((index):74)
    at HTMLButtonElement.dispatch (jquery-3.2.1.min.js:3)
    at HTMLButtonElement.q.handle (jquery-3.2.1.min.js:3)

Node.js

/home/user/github/GirExtractor/node_modules/fast-xml-parser/src/xmlNode.js:11
            this.child[child.tagname].push(child);
                                      ^

TypeError: this.child[child.tagname].push is not a function
    at module.exports.addChild (/home/user/github/GirExtractor/node_modules/fast-xml-parser/src/xmlNode.js:11:39)
    at Object.getTraversalObj (/home/user/github/GirExtractor/node_modules/fast-xml-parser/src/xmlstr2xmlnode.js:90:25)
    at Object.<anonymous> (/home/user/github/GirExtractor/gir/read.js:37:28)
    at Module._compile (internal/modules/cjs/loader.js:707:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:718:10)
    at Module.load (internal/modules/cjs/loader.js:605:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:544:12)
    at Function.Module._load (internal/modules/cjs/loader.js:536:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:760:12)
    at startup (internal/bootstrap/node.js:308:19)