[SR-11067] Property Wrappers and private breaks

[swift-ci]

Previous ID	SR-11067
Radar	None
Original Reporter	chriseidhof (JIRA User)
Type	Bug

Additional Detail from JIRA

| | | |------------------|-----------------| |Votes | 0 | |Component/s | Compiler | |Labels | Bug, CompilerCrash, PropertyWrappers | |Assignee | None | |Priority | Medium | md5: 8bbcb160b8cab5f0d8c7b0f7cbaffb3d

Issue Description:

Here's a minimal example that segfaults:

@propertyWrapper class KeychainItem {
    var wrappedValue: String? = nil
}

struct ContentView : View {
    @KeychainItem private var item: String?
    var body: some View {
        Text("Hello World")
    }
}

Removing the private modifier makes the code compile again.

BTW, the diagnostics for the segfault didn't point to this location. It took quite some time to find the culprit.

[swift-ci]

Comment by Chris Eidhof (JIRA)

Here's a similar bug, without the private modifier (but using a class):

@propertyWrapper class KeychainItem {
    var wrappedValue: String? = nil
}

class Session {
    @KeychainItem var sid: String?
}

struct ContentView : View {
    let session = Session()
    var body: some View {
        Text("Hello World")
    }
}

If we change Session to be a struct it compiles fine...

[belkadan]

The first one's fixed in master and the 5.1 branch. The second one doesn't seem to be crashing for me?