Description Stefan Folkesson 2013-01-02 05:41:50 EST

When adding listeners to AbstractSourceProvider, it stores the listeners in an array.

removeSourceProviderListener removes a listener from its position in the array and compacts the array but the compacting algorithm results in an extra copy of the last listener in the array.

Example: Let's say there are two listeners A and B.
1. The listener array will be [A,B,null,null,null,null,null] and listenerCount will be 2.

2. Now someone calls removeSourceProviderListener(A). The compacting algorithm will result in the following listener array [B,B,null,null,null,null,null]. listenerCount will be set to 1.

3. Now someone calls removeSourceProviderListener(B). This will result in the following listener array [null,B,null,null,null,null,null].

Note that the array still refers to B even though we requested the listener to be removed.