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Known issue #2

@winddpan

Description

@winddpan

Fixed! a1a8fb1

onAppear mutating doesn't work correctly

Text(person.name)
    .onAppear {
        person.name = "onAppear changed!"
    }

limited by withObservationTracking's behavior, need takes some thinking.

withObservationTracking {
    let _ = person.name
    person.name = "onAppear changed!"
} onChange: {
    print("changed")
    // not called!
}

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