NSAttributedString property occurs crash

[artemkrachulov]

Description

In our project we have to use the bindable NSAttributedString property:

struct State: Equatable {
    
    /// Text bound with text area
    @BindingState public var text: String

     /// Attributed text bound with text area
    @BindingState public var attributedString: NSAttributedString?
    ...
}

I've added it. Two or three times I could navigate to the specific screen where this state was. Then crash appears:

When I remove @BindingState property wrapper I have another crash:

8 of 10 times it crashes. So the crash is not 100% permanent. Also, I couldn't reproduce it in the clear project, this is very strange.

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

No response

Actual behavior

No response

Steps to reproduce

No response

The Composable Architecture version information

0.55.0

Destination operating system

16.5.1

Xcode version information

Version 14.3.1 (14E300c)

Swift Compiler version information

swift-driver version: 1.75.2 Apple Swift version 5.8.1 (swiftlang-5.8.0.124.5 clang-1403.0.22.11.100)
Target: x86_64-apple-macosx13.0

[stephencelis]

@artemkrachulov Without a project to work with I'm not sure there's much we can do here, so I'm going to convert to a discussion till it can be determined that this is a library bug.

I will note that I notice a couple strange things in the code above:

1. Why are you making NSAttributedString a @BindingState? I'm not aware of a SwiftUI control that takes a binding to an NSAttributedString.
2. I'm not sure NSAttributedString is safe to hold in app state in general. TCA state is meant to hold value types, but NSAttributedString is a class.

Does the crash go away entirely if you remove NSAttributedString from state and use a plain String (or AttributedString) instead?

[artemkrachulov]

@stephencelis thank you for your reply. Unfortunately, we use UIViewRepresentable with UITextArea, and now the project required NSAttributedString because we need advanced text view editing functionality.