[CS0162] Unreachable codes detected (#6509)

Author: eaba

src/core/Akka.Streams/Dsl/GraphDsl.cs

@@ -58,7 +58,9 @@ internal void AddEdge<T1, T2>(Outlet<T1> from, Inlet<T2> to) where T2 : T1
             internal TShape Add<TShape, TMat, TMat2>(IGraph<TShape, TMat> graph, Func<TMat, TMat2> transform) where TShape : Shape
             {
                 if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                     StreamLayout.Validate(graph.Module);
+#pragma warning restore CS0162 // Unreachable code detected
 
                 var copy = graph.Module.CarbonCopy();
                 _moduleInProgress = _moduleInProgress.Compose<TMat,TMat2,TMat2>(copy.TransformMaterializedValue(transform), Keep.Right);
@@ -80,7 +82,9 @@ internal TShape Add<TShape, TMat, TMat2>(IGraph<TShape, TMat> graph, Func<TMat,
             internal TShape Add<TShape, TMat1, TMat2, TMat3>(IGraph<TShape> graph, Func<TMat1, TMat2, TMat3> combine) where TShape : Shape
             {
                 if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                     StreamLayout.Validate(graph.Module);
+#pragma warning restore CS0162 // Unreachable code detected
 
                 var copy = graph.Module.CarbonCopy();
                 _moduleInProgress = _moduleInProgress.Compose(copy, combine);
@@ -101,7 +105,9 @@ public TShape Add<TShape, TMat>(IGraph<TShape, TMat> graph)
                 where TShape : Shape
             {
                 if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                     StreamLayout.Validate(graph.Module);
+#pragma warning restore CS0162 // Unreachable code detected
 
                 var copy = graph.Module.CarbonCopy();
                 _moduleInProgress = _moduleInProgress.Compose<object, TMat, object>(copy, Keep.Left);

src/core/Akka.Streams/Implementation/ActorMaterializerImpl.cs

@@ -369,7 +369,9 @@ public override TMat Materialize<TMat>(IGraph<ClosedShape, TMat> runnable, Func<
                 throw new IllegalStateException("Attempted to call Materialize() after the ActorMaterializer has been shut down.");
 
             if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                 StreamLayout.Validate(runnableGraph.Module);
+#pragma warning restore CS0162 // Unreachable code detected
 
             var session = new ActorMaterializerSession(this, runnableGraph.Module, initialAttributes, subFlowFuser);
 

src/core/Akka.Streams/Implementation/Fusing/Fusing.cs

@@ -85,7 +85,9 @@ public static Streams.Fusing.FusedGraph<TShape, TMat> Aggressive<TShape, TMat>(I
                 Attributes.None,
                 info);
 
+#pragma warning disable CS0162 // Unreachable code detected
             if (StreamLayout.IsDebug) StreamLayout.Validate(module);
+#pragma warning restore CS0162 // Unreachable code detected
             if (IsDebug) Console.WriteLine(module.ToString());
 
             return new Streams.Fusing.FusedGraph<TShape, TMat>(module, (TShape) shape);

src/core/Akka.Streams/Implementation/StreamLayout.cs

@@ -648,7 +648,9 @@ public virtual IModule Fuse<T1, T2, T3>(IModule other, OutPort from, InPort to,
         public virtual IModule Wire(OutPort from, InPort to)
         {
             if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                 StreamLayout.Validate(this);
+#pragma warning restore CS0162 // Unreachable code detected
 
             if (!OutPorts.Contains(from))
             {
@@ -687,7 +689,9 @@ public virtual IModule Wire(OutPort from, InPort to)
         public virtual IModule TransformMaterializedValue<TMat, TMat2>(Func<TMat, TMat2> mapFunc)
         {
             if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                 StreamLayout.Validate(this);
+#pragma warning restore CS0162 // Unreachable code detected
 
             return new CompositeModule(
                 subModules: IsSealed ? ImmutableArray.Create(this as IModule) : SubModules,
@@ -720,7 +724,9 @@ public virtual IModule TransformMaterializedValue<TMat, TMat2>(Func<TMat, TMat2>
         public virtual IModule Compose<T1, T2, T3>(IModule other, Func<T1, T2, T3> matFunc)
         {
             if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                 StreamLayout.Validate(this);
+#pragma warning restore CS0162 // Unreachable code detected
 
             if (Equals(other, this))
                 throw new ArgumentException(
@@ -787,7 +793,9 @@ private bool IsIgnorable(IModule module)
         public IModule ComposeNoMaterialized(IModule that)
         {
             if (StreamLayout.IsDebug)
+#pragma warning disable CS0162 // Unreachable code detected
                 StreamLayout.Validate(this);
+#pragma warning restore CS0162 // Unreachable code detected
 
             if (ReferenceEquals(this, that))
                 throw new ArgumentException(