program crashes (QtTestRunner)

[fmariusd]

i have a QtTestRunner from where i run some code, a object, which reads from an xml file
[the object.read(.... )

using the libxml2 library when i run the test a second time it crashes my application....and it

stops at this line :

reader = xmlReaderForFile(filename.c_str(), NULL, 1);

reader = xmlReaderForFile(filename.c_str(), NULL, 1);

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but when i use the object to read from the xml file and i use it from an executable project so not Qt it works fine .... even if i put the read operations in a loop

for(int i=0;i<10;i++) TheObject.read(...) ;

for(int i=0;i<10;i++) TheObject.read(...) ;

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Code from inside the object:

....
xmlTextReaderPtr reader=0;
reader = xmlReaderForFile(filename.c_str(), NULL, 1);
....

....
xmlTextReaderPtr reader=0;
reader = xmlReaderForFile(filename.c_str(), NULL, 1);
....

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