AppendingStringBuffer.insert infinite loop

When trying to insert a StringBuffer into an AppendingStringBuffer, the method

public AppendingStringBuffer insert(final int offset, final Object obj)

will call itself repeatedly generating an infinite loop.

The fix would be to call toString() method if the object is a StringBuffer

public AppendingStringBuffer insert(final int offset, final Object obj)
{
if (obj instanceof AppendingStringBuffer)

{ AppendingStringBuffer asb = (AppendingStringBuffer)obj; return insert(offset, asb.value, 0, asb.count); }

else if (obj instanceof StringBuffer)

{ //return insert(offset, obj); return insert(offset, obj.toString()); }

return insert(offset, String.valueOf(obj));
}