object content different from within method - swift

Question

I am encountering a strange behavior with an App I am building.
I have a struct Record and I create an instance of it from a NavigationViewController's child ViewController.
We can see it like this:
NavigationController (called TaskTabsController)
|
ViewController (called TaskFromController)
If I put a breakpoint, I can inspect and check the content of the object is what it should (conform to interface input data).
But when I call a method on that instance (the very next line), the different members have different or missing values.
The object instance is created from within TaskTabsController with something like so:
if let formVC = (viewControllers?[1] as? TaskFormViewController) {
let rec: TaskRecord? = formVC.makeTaskRecord()
// here the rec data are correct when I inspect the instance
rec?.prepareData()
// from the prepareData function, the properties are different of can't be accessed...
}
Ex: From controller, I can see my instance rec having a member task instance (of Task type) with a name property.
But from within the prepareData method, that task member can't display the name attached to it. (debugger says value unreadable or something like that)
Also, I can see a list of other objects, but in the method, their count is different...
Here is how makeTaskRecord method works: (from my TaskFormViewController)
In TaskFormFiewController I have a private property like so:
private var stepsSelected: [StepRecord] = []
That property is updated whit user actions.
The StepRecord is a struct. (so should be passed by value I think)
Next is the makeTaskRecord method in the same controller (gathering details from form elements)
func makeTaskRecord() -> TaskRecord? {
guard let current_task = task
else {
print("TaskForm.makeTaskRecord(): Can't create a record without a Task")
return nil
}
// check data validity
var errors:[String] = []
// generate StepRecords >>>
if stepsSelected.count == 0 {
errors.append("Error, no step selected")
}
// <<<
// DATA OK
if errors.isEmpty {
let taskrecord = TaskRecord(
id: record?.id,
taskId: task!.id,
userCode: Config.getUser()!.code, // global object containing login state
pictures: [],
memo: memo.text,
task: current_task,
stepRecords: stepsSelected // data here is correctly set
)
return taskrecord // but here, I can't retreive the stepRecords! (1)
}
else {
// display errors in an alert box
let errorVC = MyHelpers.makeAlert("Error with data", errors.joined(separator: "\n"))
self.present(errorVC, animated: true)
return nil
}
}
Here is how the prepareData() method looks like: (method of Record class)
func prepareData() -> [String: Any]? {
// no steps in record, data is invalid
guard
let stepRecordsJson = try? JSONEncoder().encode(self.stepRecords)
// This is where I constated that stepRecords is different (set but empty)
else {
return nil
}
// other data
var params = [
"task_id": taskId,
"user_code": userCode,
"step_records": stepRecordsJson, // this is what doesn't work well, but it's certainly related to (1) above
"memo": memo ?? ""
] as [String : Any]
// when editing, we set again the record ID
if let edit_id = self.id {
params["id"] = edit_id
}
return params
}
Note: All the data structures and Codable struct
In the sample above, at the (1), I put a breakpoint on the return line.
When checking data, I see that the "sub-struct" do not have good values:
(lldb) print current_task.name
(String) $R0 = "屋根工事"
(lldb) print taskrecord.task.name
error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=1, address=0x6f).
The process has been returned to the state before expression evaluation.
The task is a struct so there should not be problems about it, but the debugger can't read the task I assigned to my taskrecord.
Is there something I am missing? Like a pointer reference of some sort?