Error+ARC.m

#import <Foundation/Foundation.h>

@interface Error : NSError
@end
@implementation Error
+ (BOOL)occurError:(NSError **)error {
    *error = [[Error alloc] initWithDomain:NSCocoaErrorDomain code:0 userInfo:nil];
    return NO;
}
- (void)dealloc {
    NSLog(@"%s", __func__);
}
@end

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSError * _Nullable error = nil;
        for (NSUInteger i = 0; i < 100; i++) @autoreleasepool {
            [Error occurError:&error];
        }
        NSLog(@"%@", error);
    }
    return 0;
}