想问一下为什么这里有个等号？照理说下标要比数量少1的。然后有第三方库奔溃在这，但是这库没开源，麻烦看一下


- (void) hookInsertObject:(id)anObject atIndex:(NSUInteger)index {
    if (anObject && index <= self.count) {
        [self hookInsertObject:anObject atIndex:index];
    }else{
        handleCrashException(JJExceptionGuardArrayContainer,[NSString stringWithFormat:@"NSMutableArray insertObject invalid index:%tu total:%tu insert object:%@",index,self.count,anObject]);
    }
}