objective-c - NSAppleScript 内存泄漏

Question

我有 OS X 10.6 SDK 的代码。有一件事我无法理解。

[1]

int main(int argc, const char*argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSString *strScript =
    @"set theURL to \"\" \n"
    "tell application \"Safari\" \n"
    "set theURL to URL of current tab of window 1 \n"
    "end tell \n"
    "return theURL \n";

    int poolCount = 0;
    while(1)
    {
        poolCount++;
        NSAppleScript *script = [[[NSAppleScript alloc] initWithSource:strScript] autorelease];
        NSArray *array = [[[script executeAndReturnError:nil] stringValue] componentsSeparatedByString:@" "];

        if (array) {
            NSLog(@"%@", array);
        }

        if (poolCount>=100)
        {
            [pool release];
            pool = [[NSAutoreleasePool alloc] init];
            poolCount = 0;
        }
    }
    [pool release];
}

在代码中，当 poolCount 为 100 时释放和分配 autoreleasepool。我发现总是存在泄漏。

但是下面的代码没有泄漏。

[2]

int main(int argc, const char*argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSString *strScript =
    @"set theURL to \"\" \n"
    "tell application \"Safari\" \n"
    "set theURL to URL of current tab of window 1 \n"
    "end tell \n"
    "return theURL \n";

    while(1)
    {
        NSAutoreleasePool *lpool = [[NSAutoreleasePool alloc] init];

        NSAppleScript *script = [[[NSAppleScript alloc] initWithSource:strScript] autorelease];
        NSArray *array = [[[script executeAndReturnError:nil] stringValue] componentsSeparatedByString:@" "];

        if (array) {
            NSLog(@"%@", array);
        }

        [lpool release];            
    }

    [pool release];
}

内部循环的自动释放池是 [1] 和 [2] 之间的区别。

请让我知道为什么在 [1] 的情况下内存泄漏。