java.util.zip.ZipFile.entries() is not safe.

Think of code as follows:
ZipFile zfile = new ZipFile("regular zip file");
Enumeration entries = zfile.entries();
zfile.close();
entries.nextElement();

#
# An EXCEPTION_ACCESS_VIOLATION exception has been detected in native code outside the VM.
# Program counter=0x1000dde0
#