Crash when using from multiple threads about libphonenumber-ios HOT 10 CLOSED

Thread 9 Crashed:
0   libsystem_kernel.dylib               0x0000000198cc7270 __pthread_kill + 8
1   libsystem_pthread.dylib              0x0000000198d65170 pthread_kill + 108
2   libsystem_c.dylib                    0x0000000198c3eb18 abort + 108
3   libsystem_malloc.dylib               0x0000000198d023e4 nanozone_error + 316
4   libsystem_malloc.dylib               0x0000000198d02550 _nano_malloc_check_clear + 360
5   libsystem_malloc.dylib               0x0000000198d01064 nano_malloc + 40
6   libsystem_malloc.dylib               0x0000000198cf13e4 malloc_zone_malloc + 112
7   libsystem_malloc.dylib               0x0000000198cf5a04 malloc + 52
8   libicucore.A.dylib                   0x0000000197f36664 icu::UnicodeSet::UnicodeSet() + 104
9   libicucore.A.dylib                   0x0000000197ff8214 icu::RuleBasedTimeZone::getLocalDelta(int, int, int, int, int, int) const + 7076
10  libicucore.A.dylib                   0x0000000197ff6afc icu::RuleBasedTimeZone::getLocalDelta(int, int, int, int, int, int) const + 1164
11  libicucore.A.dylib                   0x000000019800ecb8 icu::RegexPattern::compile(UText*, unsigned int, UParseError&, UErrorCode&) + 280
12  libicucore.A.dylib                   0x000000019804d174 uregex_open + 336
13  Foundation                           0x0000000187b79a34 -[NSRegularExpression initWithPattern:options:error:] + 400
14  Foundation                           0x0000000187c885d4 +[NSRegularExpression regularExpressionWithPattern:options:error:] + 68
15  WhereToKit                           0x00000001005b0948 -[NBPhoneNumberUtil regularExpressionWithPattern:options:error:] (NBPhoneNumberUtil.m:167)
16  WhereToKit                           0x00000001005b07bc -[NBPhoneNumberUtil entireRegularExpressionWithPattern:options:error:] (NBPhoneNumberUtil.m:144)
17  WhereToKit                           0x00000001005be318 -[NBPhoneNumberUtil matchesEntirely:string:] (NBPhoneNumberUtil.m:3848)
18  WhereToKit                           0x00000001005b8c28 -[NBPhoneNumberUtil isNumberMatchingDesc:numberDesc:] (NBPhoneNumberUtil.m:2255)
19  WhereToKit                           0x00000001005b890c -[NBPhoneNumberUtil getNumberTypeHelper:metadata:] (NBPhoneNumberUtil.m:2209)
20  WhereToKit                           0x00000001005b924c -[NBPhoneNumberUtil getRegionCodeForNumberFromRegionList:regionCodes:] (NBPhoneNumberUtil.m:2377)
21  WhereToKit                           0x00000001005b9034 -[NBPhoneNumberUtil getRegionCodeForNumber:] (NBPhoneNumberUtil.m:2350)
22  WhereToKit                           0x00000001005b8c7c -[NBPhoneNumberUtil isValidNumber:] (NBPhoneNumberUtil.m:2272)

Thread 13 Crashed:
0   libsystem_kernel.dylib               0x0000000195373270 __pthread_kill + 8
1   libsystem_pthread.dylib              0x0000000195411170 pthread_kill + 108
2   libsystem_c.dylib                    0x00000001952eab18 abort + 108
3   libsystem_malloc.dylib               0x00000001953ae3e4 nanozone_error + 316
4   libsystem_malloc.dylib               0x00000001953ae550 _nano_malloc_check_clear + 360
5   libsystem_malloc.dylib               0x00000001953ad064 nano_malloc + 40
6   libsystem_malloc.dylib               0x000000019539d3e4 malloc_zone_malloc + 112
7   libsystem_malloc.dylib               0x00000001953a1a04 malloc + 52
8   libicucore.A.dylib                   0x00000001945e2664 icu::UnicodeSet::UnicodeSet() + 104
9   libicucore.A.dylib                   0x00000001946a4214 icu::RuleBasedTimeZone::getLocalDelta(int, int, int, int, int, int) const + 7076
10  libicucore.A.dylib                   0x00000001946a2afc icu::RuleBasedTimeZone::getLocalDelta(int, int, int, int, int, int) const + 1164
11  libicucore.A.dylib                   0x00000001946bacb8 icu::RegexPattern::compile(UText*, unsigned int, UParseError&, UErrorCode&) + 280
12  libicucore.A.dylib                   0x00000001946f9174 uregex_open + 336
13  Foundation                           0x0000000184225a34 -[NSRegularExpression initWithPattern:options:error:] + 400
14  Foundation                           0x00000001843345d4 +[NSRegularExpression regularExpressionWithPattern:options:error:] + 68
15  WhereToKit                           0x00000001006184d4 -[NBPhoneNumberUtil regularExpressionWithPattern:options:error:] (NBPhoneNumberUtil.m:167)
16  WhereToKit                           0x0000000100618a38 -[NBPhoneNumberUtil replaceStringByRegex:regex:withTemplate:] (NBPhoneNumberUtil.m:242)
17  WhereToKit                           0x000000010061a9ac -[NBPhoneNumberUtil extractPossibleNumber:] (NBPhoneNumberUtil.m:530)
18  WhereToKit                           0x0000000100624d64 -[NBPhoneNumberUtil buildNationalNumberForParsing:nationalNumber:] (NBPhoneNumberUtil.m:3583)
19  WhereToKit                           0x00000001006240f4 -[NBPhoneNumberUtil parseHelper:defaultRegion:keepRawInput:checkRegion:error:] (NBPhoneNumberUtil.m:3391)
20  WhereToKit                           0x00000001006239e0 -[NBPhoneNumberUtil parse:defaultRegion:error:] (NBPhoneNumberUtil.m:3251)

- (NSString *)stringWithRandomNumber
{
    NSString *numbers = @"0123456789";
    NSMutableString *randomString = [NSMutableString stringWithCapacity:11];

    for (int i=0; i<12; i++) {
        [randomString appendFormat: @"%C", [numbers characterAtIndex: arc4random() % [numbers length]]];
    }

    return randomString;
}


- (NSString *)randomRegion
{
    NBMetadataHelper *aHelper = [[NBMetadataHelper alloc] init];
    NSDictionary *metadata = [[aHelper getAllMetadata] objectAtIndex:(arc4random() % [aHelper getAllMetadata].count)];
    if (metadata) {
        NSString *region = [metadata objectForKey:@"code"];
        if (region) {
            return region;
        }
    }

    return nil;
}


- (void)testForMultithread
{
    NBPhoneNumberUtil *aUtil = [[NBPhoneNumberUtil alloc] init];
    NSString *testRegion = [self randomRegion];

    if (!testRegion) {
        return;
    }

    NSLog(@"- START [%@]", testRegion);

    dispatch_async(dispatch_get_main_queue(), ^{
        NSError *error = nil;

        for (int i=0; i<1000; i++) {
            [aUtil parse:[self stringWithRandomNumber] defaultRegion:testRegion error:&error];
            if (error && ![error.domain isEqualToString:@"INVALID_COUNTRY_CODE"]) {
                NSLog(@"error [%@]", [error localizedDescription]);
            }
            error = nil;
        }

        NSLog(@"OK [%@]", testRegion);
    });
}


- (void)testWithGCD
{
    for (int i = 0; i<1000; i++) {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
            [self testForMultithread];
        });
    }
}