this is not a bug. author doesn't seem to understand how jvm or managed memory works. he uses memory from parent object in child code without holding a reference to it in child object. If his code was in pure java this simply won't be possible. The only reason he is able to do this is via native code.

Even in native code, it is wrong to have a pointer to managed memory without using the Global/Local Ref() methods that the jvm provides.

In summary, the jvm is behaving correctly with respect to GC. Author doesn't know how to use JNI and has caused the crash.