parse GPX file throw a exception

[yhonet]

I don't know what data cause this exception, maybe like "<ele/>".

There is a same problem in another lib:
https://github.com/ticofab/android-gpx-parser
I post a issue at:
ticofab/android-gpx-parser#1

Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String org.w3c.dom.Node.getNodeValue()' on a null object reference
at com.hs.gpxparser.GPXParser.getNodeValueAsDouble(GPXParser.java:515)
at com.hs.gpxparser.GPXParser.parseWaypoint(GPXParser.java:331)
at com.hs.gpxparser.GPXParser.parseTrackSegment(GPXParser.java:488)
at com.hs.gpxparser.GPXParser.parseTrack(GPXParser.java:466)
at com.hs.gpxparser.GPXParser.parseGPX(GPXParser.java:98)

[ThomasDaheim]

I have checked and that gives a proper parser exception:

org.xml.sax.SAXParseException; lineNumber: 14; columnNumber: 6; The element type "ele" must be terminated by the matching end-tag "".

Impossible to say without an example file