Pull the concurrency warnings fixes to the 1.x branch

FuzzTesting/Sources/FuzzCommon/fuzz_testing.pb.swift

@@ -3551,7 +3551,15 @@ extension Fuzz_Testing_Message: SwiftProtobuf.Message, SwiftProtobuf._MessageImp
     var _singularMessageSet: Fuzz_Testing_AMessageSetMessage? = nil
     var _repeatedMessageSet: [Fuzz_Testing_AMessageSetMessage] = []
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/Conformance/google/protobuf/test_messages_proto2.pb.swift

@@ -2446,7 +2446,15 @@ extension ProtobufTestMessages_Proto2_TestAllTypesProto2: SwiftProtobuf.Message,
     var _fieldName17__: Int32? = nil
     var _fieldName18__: Int32? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -3397,7 +3405,15 @@ extension ProtobufTestMessages_Proto2_TestAllTypesProto2.NestedMessage: SwiftPro
     var _a: Int32? = nil
     var _corecursive: ProtobufTestMessages_Proto2_TestAllTypesProto2? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -3960,7 +3976,15 @@ extension ProtobufTestMessages_Proto2_TestAllRequiredTypesProto2: SwiftProtobuf.
     var _defaultString: String? = nil
     var _defaultBytes: Data? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -4322,7 +4346,15 @@ extension ProtobufTestMessages_Proto2_TestAllRequiredTypesProto2.NestedMessage:
     var _corecursive: ProtobufTestMessages_Proto2_TestAllRequiredTypesProto2? = nil
     var _optionalCorecursive: ProtobufTestMessages_Proto2_TestAllRequiredTypesProto2? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/Conformance/google/protobuf/test_messages_proto3.pb.swift

@@ -1545,7 +1545,15 @@ extension ProtobufTestMessages_Proto3_TestAllTypesProto3: SwiftProtobuf.Message,
     var _fieldName17__: Int32 = 0
     var _fieldName18__: Int32 = 0
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -2602,7 +2610,15 @@ extension ProtobufTestMessages_Proto3_TestAllTypesProto3.NestedMessage: SwiftPro
     var _a: Int32 = 0
     var _corecursive: ProtobufTestMessages_Proto3_TestAllTypesProto3? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobuf/google/protobuf/descriptor.pb.swift

@@ -3261,7 +3261,15 @@ extension Google_Protobuf_DescriptorProto: SwiftProtobuf.Message, SwiftProtobuf.
     var _reservedRange: [Google_Protobuf_DescriptorProto.ReservedRange] = []
     var _reservedName: [String] = []
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -4128,7 +4136,15 @@ extension Google_Protobuf_FileOptions: SwiftProtobuf.Message, SwiftProtobuf._Mes
     var _features: Google_Protobuf_FeatureSet? = nil
     var _uninterpretedOption: [Google_Protobuf_UninterpretedOption] = []
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -4444,7 +4460,15 @@ extension Google_Protobuf_FieldOptions: SwiftProtobuf.Message, SwiftProtobuf._Me
     var _features: Google_Protobuf_FeatureSet? = nil
     var _uninterpretedOption: [Google_Protobuf_UninterpretedOption] = []
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufPluginLibraryTests/pluginlib_descriptor_test.pb.swift

@@ -768,7 +768,15 @@ extension SDTTopLevelMessage: SwiftProtobuf.Message, SwiftProtobuf._MessageImple
     var _field2: Int32? = nil
     var _o: SDTTopLevelMessage.OneOf_O?
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -917,7 +925,15 @@ extension SDTTopLevelMessage.SubMessage: SwiftProtobuf.Message, SwiftProtobuf._M
     var _field2: String? = nil
     var _field3: SDTTopLevelMessage.SubMessage? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -999,7 +1015,15 @@ extension SDTTopLevelMessage2: SwiftProtobuf.Message, SwiftProtobuf._MessageImpl
     var _left: SDTTopLevelMessage? = nil
     var _right: SDTTopLevelMessage2? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufTests/fuzz_testing.pb.swift

@@ -3551,7 +3551,15 @@ extension Fuzz_Testing_Message: SwiftProtobuf.Message, SwiftProtobuf._MessageImp
     var _singularMessageSet: Fuzz_Testing_AMessageSetMessage? = nil
     var _repeatedMessageSet: [Fuzz_Testing_AMessageSetMessage] = []
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufTests/generated_swift_names_fields.pb.swift

@@ -6666,7 +6666,15 @@ extension ProtobufUnittestGenerated_GeneratedSwiftReservedFields: SwiftProtobuf.
     var _written: Int32 = 0
     var _yday: Int32 = 0
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufTests/map_unittest.pb.swift

@@ -291,7 +291,15 @@ extension ProtobufUnittest_TestMap: SwiftProtobuf.Message, SwiftProtobuf._Messag
     var _mapStringForeignMessage: Dictionary<String,ProtobufUnittest_ForeignMessage> = [:]
     var _mapInt32AllTypes: Dictionary<Int32,ProtobufUnittest_TestAllTypes> = [:]
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufTests/test_messages_proto3.pb.swift

@@ -1100,7 +1100,15 @@ extension ProtobufTestMessages_Proto3_TestAllTypesProto3: SwiftProtobuf.Message,
     var _fieldName17__: Int32 = 0
     var _fieldName18__: Int32 = 0
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -1909,7 +1917,15 @@ extension ProtobufTestMessages_Proto3_TestAllTypesProto3.NestedMessage: SwiftPro
     var _a: Int32 = 0
     var _corecursive: ProtobufTestMessages_Proto3_TestAllTypesProto3? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 

Reference/SwiftProtobufTests/unittest.pb.swift

@@ -4681,7 +4681,15 @@ extension ProtobufUnittest_TestAllTypes: SwiftProtobuf.Message, SwiftProtobuf._M
     var _defaultCord: String? = nil
     var _oneofField: ProtobufUnittest_TestAllTypes.OneOf_OneofField?
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -5358,7 +5366,15 @@ extension ProtobufUnittest_NestedTestAllTypes: SwiftProtobuf.Message, SwiftProto
     var _lazyChild: ProtobufUnittest_NestedTestAllTypes? = nil
     var _eagerChild: ProtobufUnittest_TestAllTypes? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -5678,7 +5694,15 @@ extension ProtobufUnittest_TestRequired: SwiftProtobuf.Message, SwiftProtobuf._M
     var _c: Int32? = nil
     var _optionalForeign: ProtobufUnittest_ForeignMessage? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -6132,7 +6156,15 @@ extension ProtobufUnittest_TestRecursiveMessage: SwiftProtobuf.Message, SwiftPro
     var _a: ProtobufUnittest_TestRecursiveMessage? = nil
     var _i: Int32? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}
 
@@ -6364,7 +6396,15 @@ extension ProtobufUnittest_TestExtremeDefaultValues: SwiftProtobuf.Message, Swif
     var _cordWithZero: String? = nil
     var _replacementString: String? = nil
 
-    static let defaultInstance = _StorageClass()
+    #if swift(>=5.10)
+      // This property is used as the initial default value for new instances of the type.
+      // The type itself is protecting the reference to its storage via CoW semantics.
+      // This will force a copy to be made of this reference when the first mutation occurs;
+      // hence, it is safe to mark this as `nonisolated(unsafe)`.
+      static nonisolated(unsafe) let defaultInstance = _StorageClass()
+    #else
+      static let defaultInstance = _StorageClass()
+    #endif
 
     private init() {}