Crash in the extract function (remove ability to try deserialize unsupported types)

[akmarinov]

I'm having an issue where Bluejay crashes in

Here's the call stack:

There's no console output for the crash, just that bad access.

My code is

struct AdvertisingData: Receivable {
    private(set) var partNumber: String
    private(set) var serialNumber: String


    init(bluetoothData: Data) throws {
        let serialNumberData: Data = try bluetoothData.extract(start: 0, length: 6)

    }
}

if I do

let partNumberData: Data = bluetoothData.subdata(in: 0..<0+6)

instead on my own, I'm able to get the sub data and use it to initialize my string to the correct value.

Any idea why you use .withUnsafeBytes { $0.pointee } and why it seems to crash with bad access?

Am I doing something wrong? I want to extract a string from a data that I receive.

[sakuraehikaru]

Thank you for finding this problem. I've filed an issue #164 with explanations and solutions for moving forward, and sorry we weren't able to catch this earlier in our development and testing.

[akmarinov]

No worries, love the library!

It’s not just Strings, btw. Trying to extract a Data in this case and it still fails. (Though Strings also fail)

[sakuraehikaru]

At long last, we're close to having a reasonable solution for this: https://github.com/steamclock/bluejay/pull/195

I've tested the PR and both string and data extraction are now working as expected. Also, see the updated readme in that branch for more examples.