App crashes when calling HKHealthStore's execute method on HKStatisticsCollectionQuery - ios

Question

I'm trying to retrieve the steps data from Health Kit and get an update everytime this data changes.
But when the HKHealthStore calls its execute method on the query, the app crash:
And I have no idea why. Any help is welcome.
Here is my code:
func sretrieveRealTimeSteps(completion: #escaping (Int) -> Void) {
let calendar = Calendar.current
var interval = DateComponents()
interval.day = 1
var anchorComponents = calendar.dateComponents([.day, .month, .year, .weekday], from: Date())
anchorComponents.hour = 0
guard let anchorDate = calendar.date(from: anchorComponents) else { completion(0); return }
guard let quantityType = HKObjectType.quantityType(forIdentifier: .stepCount) else { completion(0); return }
let realTimeQuery = HKStatisticsCollectionQuery(quantityType: quantityType,
quantitySamplePredicate: nil,
options: .cumulativeSum,
anchorDate: anchorDate,
intervalComponents: interval)
realTimeQuery.statisticsUpdateHandler = { query, statistics, results, error in
guard let statsCollection = results else {
completion(0)
return
}
statsCollection.enumerateStatistics(from: Date(), to: Date()) { statistics, stop in
if let quantity = statistics.sumQuantity() {
let value = quantity.doubleValue(for: HKUnit.count())
completion(Int(value))
} else {
completion(0)
}
}
}
healthKitStore.execute(realTimeQuery)
}
Also, when I used a one time query there is no problem:
query.initialResultsHandler = { query, results, error in
guard let statsCollection = results else {
NotificationView.showHealthKitRetrieveInfoFailedNotification()
completion(nil, error)
return
}
var values = [Int]()
let endDate = Date()
let startDate = calendar.date(byAdding: .day, value: -6, to: endDate) ?? Date()
statsCollection.enumerateStatistics(from: startDate, to: endDate) { statistics, stop in
if let quantity = statistics.sumQuantity() {
let date = statistics.startDate
let value = quantity.doubleValue(for: HKUnit.count())
values.append(Int(value))
if date.isSameDayThan(endDate, timeZone: TimeZone.current) {
completion(values, nil)
}
} else {
values.append(0)
if values.count == 7 {
stop.pointee = true
completion(values, nil)
}
}
}
}
EDIT: Stacktrace