- (NSString *) stringFromDate:(NSDate *)date formatString:(NSString *)dateFormat timeZone:(NSTimeZone *)timeZone App got crashed.

[shaikshabana]

Here is crash log:

0 libdispatch.dylib 0x1d3191be _dispatch_semaphore_dispose + 80 (semaphore.c:69)
1 Foundation 0x1e510b20 -[NSDateFormatter dealloc] + 74 (NSDateFormatter.m:291)
2 libobjc.A.dylib 0x1cee9258 objc_object::sidetable_release(bool) + 238 (NSObject.mm:1591)
3 ISO8601DateFormatter 0x0117e522 -[ISO8601DateFormatter stringFromDate:formatString:timeZone:] + 228 (ISO8601DateFormatter.m:716)
4 ISO8601DateFormatter 0x0117e3e6 -[ISO8601DateFormatter stringFromDate:timeZone:] + 132 (ISO8601DateFormatter.m:697)

When see code we are deallocating formatter but due to crash it's not going further steps where it's getting allocated.

if ([dateFormat isEqualToString:lastUsedFormatString] == NO) {
[unparsingFormatter release];
unparsingFormatter = nil;

	[lastUsedFormatString release];
	lastUsedFormatString = [dateFormat retain];
}

if (!unparsingFormatter) {
	unparsingFormatter = [[NSDateFormatter alloc] init];
	unparsingFormatter.formatterBehavior = NSDateFormatterBehavior10_4;
	unparsingFormatter.dateFormat = dateFormat;
	unparsingFormatter.calendar = unparsingCalendar;
	unparsingFormatter.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"] autorelease];
}

Any inputs to fix this are welcome.