Fix Swift 6.4 warnings (#6240)

UnitTests/Sources/DeferredFulfillmentTests.swift

@@ -46,11 +46,12 @@ struct DeferredFulfillmentTests {
         let deferred = deferFulfillment(observable.observe(\.counter)) { $0 == newValue }
         
         // When that value is changed asynchronously.
-        Task { try await observable.setCounter(newValue, delay: .seconds(1)) }
+        let task = Task { try await observable.setCounter(newValue, delay: .seconds(1)) }
         #expect(observable.counter == 0)
         
         // Then the test should be fulfilled once the update has taken place.
         try await deferred.fulfill()
+        try await task.value
         #expect(observable.counter == newValue)
     }
     
@@ -61,7 +62,7 @@ struct DeferredFulfillmentTests {
         let deferred = deferFulfillment(observable.observe(\.counter)) { $0 == finalValue }
         
         // When that value is changed asynchronously with some intermediate values before it is reached.
-        Task {
+        let task = Task {
             try await observable.setCounter(100, delay: .seconds(.random(in: 1.0...2.0)))
             try await observable.setCounter(250, delay: .seconds(.random(in: 1.0...2.0)))
             try await observable.setCounter(finalValue, delay: .seconds(.random(in: 1.0...2.0)))
@@ -70,6 +71,7 @@ struct DeferredFulfillmentTests {
         
         // Then the test should be fulfilled once the expected update has taken place.
         try await deferred.fulfill()
+        try await task.value
         #expect(observable.counter == finalValue)
     }
 }

UnitTests/Sources/UserProfileScreenViewModelTests.swift

@@ -81,7 +81,7 @@ struct UserProfileScreenViewModelTests {
         let waitForMemberToLoad = deferFulfillment(context.observe(\.viewState.userProfile)) { $0 != nil }
         try await waitForMemberToLoad.fulfill()
         
-        let deferred = deferFulfillment(context.observe(\.viewState.bindings).compactMap(\.inviteConfirmationUser), timeout: .seconds(5)) { $0.isUnknown }
+        let deferred = deferFulfillment(context.observe(\.viewState.bindings.inviteConfirmationUser), timeout: .seconds(5)) { $0?.isUnknown == true }
         
         context.send(viewAction: .openDirectChat)
         try await deferred.fulfill()

UnitTests/SupportingFiles/target.yml

@@ -47,7 +47,7 @@ targets:
         PRODUCT_BUNDLE_IDENTIFIER: ${BASE_BUNDLE_IDENTIFIER}.unit.tests
         # Requires iOS 26 so tests exercise the Observations-based observe(_:) overload.
         IPHONEOS_DEPLOYMENT_TARGET: '26.0'
-        SWIFT_VERSION: 6.2
+        SWIFT_VERSION: 6
         SWIFT_APPROACHABLE_CONCURRENCY: YES
         SWIFT_DEFAULT_ACTOR_ISOLATION: MainActor
       debug: