How to prevent crash when canceling MFMailComposeViewController?

Where:

if([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *email_vc = [[MFMailComposeViewController alloc] init];
    email_vc.mailComposeDelegate = self;

    [email_vc setSubject:subject];
    [email_vc setMessageBody:message isHTML:FALSE];
    [email_vc setToRecipients:recipients];

    [self presentModalViewController:email_vc animated:FALSE];
    [[UIApplication sharedApplication] setStatusBarHidden:TRUE];
    [email_vc release];
}
else
...

Somewhere else:

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    switch (result) 
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Cancelled");
            break;

        case MFMailComposeResultSaved:
            NSLog(@"Saved");
            break;

        case MFMailComposeResultSent:
            NSLog(@"Sent");
            break;

        case MFMailComposeResultFailed:
            NSLog(@"Compose result failed");
            break;

        default:
            NSLog(@"Default: Cancelled");
            break;
    }

    // This ugly thing is required because dismissModalViewControllerAnimated causes a crash
    // if called right away when "Cancel" is touched.

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.01 * NSEC_PER_SEC), dispatch_get_current_queue(), ^
    {
        [self dismissModalViewControllerAnimated:FALSE];
    }); 

}

This ugly dispatch_after block is the only way to get this to work without crashing.

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MFMailComposeViewController iPad

EDIT 1:

Incident Identifier: ****************
CrashReporter Key:   *****************
Hardware Model:      iPhone4,1
Process:         ************* [9038]
Path:            /var/mobile/Applications/*********************
Identifier:      ***********************
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2012-07-20 11:25:53.704 -0700
OS Version:      iPhone OS 5.0.1 (9A405)
Report Version:  104

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0xa003853a
Crashed Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libobjc.A.dylib                 0x316b9fbc 0x316b6000 + 16316
1   UIKit                           0x350caa9e 0x34f8e000 + 1297054
2   UIKit                           0x34fa6814 0x34f8e000 + 100372
3   UIKit                           0x34fabfb2 0x34f8e000 + 122802
4   QuartzCore                      0x33354ba0 0x33329000 + 179104
5   libdispatch.dylib               0x37896f74 0x37894000 + 12148
6   CoreFoundation                  0x37bac2d6 0x37b20000 + 574166
7   CoreFoundation                  0x37b2f4d6 0x37b20000 + 62678
8   CoreFoundation                  0x37b2f39e 0x37b20000 + 62366
9   GraphicsServices                0x376adfc6 0x376aa000 + 16326
10  UIKit                           0x34fbf73c 0x34f8e000 + 202556
11  *****************               0x00002346 main (main.m:14)
12  *****************               0x00002304 start + 32

2: , Apple.

MailComposer:

http://developer.apple.com/library/ios/#samplecode/MailComposer/Introduction/Intro.html

.

, .

[self presentModalViewController:picker animated:FALSE];

[self dismissModalViewControllerAnimated:FALSE];

, , , "" .

:

-[MFMailComposeController actionSheet:didDismissWithButtonIndex:]: message sent to deallocated instance 0x7479ef0

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3: .

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