Update pinned compiler version

eng/Versions.props

@@ -17,8 +17,8 @@
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
     <!-- Opt-in/out repo features -->
     <UsingToolMicrosoftNetCompilers>true</UsingToolMicrosoftNetCompilers>
-    <!-- TODO: Upgrade compiler version to enable Static Abstracts in Interfaces; remove this once the employed SDK uses a new enough version. -->
-    <MicrosoftNetCompilersToolsetVersion>4.0.0-2.21323.11</MicrosoftNetCompilersToolsetVersion>
+    <!-- TODO: Upgrade compiler version to enable Static Abstracts in Interfaces and interpolated string handlers; remove this once the employed SDK uses a new enough version. -->
+    <MicrosoftNetCompilersToolsetVersion>4.0.0-3.21362.7</MicrosoftNetCompilersToolsetVersion>
     <UsingToolMicrosoftNetILLinkTasks>true</UsingToolMicrosoftNetILLinkTasks>
     <UsingToolIbcOptimization>false</UsingToolIbcOptimization>
     <UsingToolXliff>false</UsingToolXliff>

src/libraries/Common/tests/System/Net/Prerequisites/NetCoreServer/Handlers/EchoWebSocketHandler.cs

@@ -80,7 +80,7 @@ private static async Task ProcessWebSocketRequest(
                         await socket.CloseAsync(
                             closeStatus,
                             replyWithEnhancedCloseMessage ?
-                                $"Server received: {(int)closeStatus} {receiveResult.CloseStatusDescription}" :
+                                ("Server received: " + (int)closeStatus + " " + receiveResult.CloseStatusDescription) :
                                 receiveResult.CloseStatusDescription,
                             CancellationToken.None);
                     }

src/libraries/Common/tests/System/Net/Prerequisites/NetCoreServer/Handlers/RedirectHandler.cs

@@ -20,14 +20,14 @@ public static void Invoke(HttpContext context)
                     if (statusCode < 300 || statusCode > 308)
                     {
                         context.Response.StatusCode = 400;
-                        context.Response.SetStatusDescription($"Invalid redirect statuscode: {statusCodeString}");
+                        context.Response.SetStatusDescription("Invalid redirect statuscode: " + statusCodeString);
                         return;
                     }
                 }
                 catch (Exception)
                 {
                     context.Response.StatusCode = 400;
-                    context.Response.SetStatusDescription($"Error parsing statuscode: {statusCodeString}");
+                    context.Response.SetStatusDescription("Error parsing statuscode: " + statusCodeString);
                     return;
                 }
             }
@@ -36,7 +36,7 @@ public static void Invoke(HttpContext context)
             if (string.IsNullOrEmpty(redirectUri))
             {
                 context.Response.StatusCode = 400;
-                context.Response.SetStatusDescription($"Missing redirection uri");
+                context.Response.SetStatusDescription("Missing redirection uri");
                 return;
             }
 
@@ -51,7 +51,7 @@ public static void Invoke(HttpContext context)
                 catch (Exception)
                 {
                     context.Response.StatusCode = 400;
-                    context.Response.SetStatusDescription($"Error parsing hops: {hopsString}");
+                    context.Response.SetStatusDescription("Error parsing hops: " + hopsString);
                     return;
                 }
             }

src/libraries/Common/tests/System/Net/Prerequisites/NetCoreServer/Handlers/StatusCodeHandler.cs

@@ -22,7 +22,7 @@ public static void Invoke(HttpContext context)
             catch (Exception)
             {
                 context.Response.StatusCode = 400;
-                context.Response.SetStatusDescription($"Error parsing statuscode: {statusCodeString}");
+                context.Response.SetStatusDescription("Error parsing statuscode: " + statusCodeString);
             }
         }
     }

src/libraries/Common/tests/System/Net/Prerequisites/NetCoreServer/Handlers/VersionHandler.cs

@@ -30,13 +30,13 @@ private static string GetVersionInfo()
             FileVersionInfo fi = FileVersionInfo.GetVersionInfo(path);
 
             var buffer = new StringBuilder();
-            buffer.AppendLine($"Information for: {Path.GetFileName(path)}");
-            buffer.AppendLine($"Location: {Path.GetDirectoryName(path)}");
-            buffer.AppendLine($"Framework: {RuntimeInformation.FrameworkDescription}");
-            buffer.AppendLine($"File Version: {fi.FileVersion}");
-            buffer.AppendLine($"Product Version: {fi.ProductVersion}");
-            buffer.AppendLine($"Creation Date: {File.GetCreationTime(path)}");
-            buffer.AppendLine($"Last Modified: {File.GetLastWriteTime(path)}");
+            buffer.AppendLine("Information for: " + Path.GetFileName(path));
+            buffer.AppendLine("Location: " + Path.GetDirectoryName(path));
+            buffer.AppendLine("Framework: " + RuntimeInformation.FrameworkDescription);
+            buffer.AppendLine("File Version: " + fi.FileVersion);
+            buffer.AppendLine("Product Version: " + fi.ProductVersion);
+            buffer.AppendLine("Creation Date: " + File.GetCreationTime(path));
+            buffer.AppendLine("Last Modified: " + File.GetLastWriteTime(path));
 
             return buffer.ToString();
         }        

src/libraries/Common/tests/System/Net/Prerequisites/NetCoreServer/Helpers/AuthenticationHelper.cs

@@ -34,7 +34,7 @@ public static bool HandleAuthentication(HttpContext context)
             else if (authType != null)
             {
                 context.Response.StatusCode = 501;
-                context.Response.SetStatusDescription($"Unsupported auth type: {authType}");
+                context.Response.SetStatusDescription("Unsupported auth type: " + authType);
                 return false;
             }
 
@@ -57,14 +57,14 @@ private static bool HandleBasicAuthentication(HttpContext context, string user,
             if (split.Length < 2)
             {
                 context.Response.StatusCode = 500;
-                context.Response.SetStatusDescription($"Invalid Authorization header: {authHeader}");
+                context.Response.SetStatusDescription("Invalid Authorization header: " + authHeader); ;
                 return false;
             }
 
             if (!string.Equals("basic", split[0], StringComparison.OrdinalIgnoreCase))
             {
                 context.Response.StatusCode = 500;
-                context.Response.SetStatusDescription($"Unsupported auth type: {split[0]}");
+                context.Response.SetStatusDescription("Unsupported auth type: " + split[0]);
                 return false;
             }
 
@@ -106,8 +106,7 @@ private static bool HandleChallengeResponseAuthentication(
 
             // We don't fully support this authentication method.
             context.Response.StatusCode = 501;
-            context.Response.SetStatusDescription(
-                    $"Attempt to use unsupported challenge/response auth type. {authType}: {authHeader}");
+            context.Response.SetStatusDescription("Attempt to use unsupported challenge/response auth type. " + authType + ": " + authHeader);
 
             return false;
         }

src/libraries/System.Console/tests/Helpers.cs

@@ -17,29 +17,17 @@ public static void SetAndReadHelper(Action<TextWriter> setHelper, Func<TextWrite
 
         try
         {
-            using (MemoryStream memStream = new MemoryStream())
-            {
-                using (StreamWriter sw = new StreamWriter(memStream))
-                {
-                    setHelper(sw);
+            var memStream = new MemoryStream();
+            var sw = new StreamWriter(memStream);
+            setHelper(sw);
 
-                    TextWriter newStream = getHelper();
+            TextWriter newStream = getHelper();
+            Assert.NotNull(newStream);
+            newStream.Write(TestString);
+            newStream.Flush();
 
-                    Assert.NotNull(newStream);
-
-                    newStream.Write(TestString);
-                    newStream.Flush();
-
-                    memStream.Seek(0, SeekOrigin.Begin);
-
-                    using (StreamReader sr = new StreamReader(memStream))
-                    {
-                        string fromConsole = readHelper(sr);
-
-                        Assert.Equal(TestString, fromConsole);
-                    }
-                }
-            }
+            memStream.Seek(0, SeekOrigin.Begin);
+            Assert.Equal(TestString, readHelper(new StreamReader(memStream)));
         }
         finally
         {

src/libraries/System.Threading.Tasks.Extensions/tests/PoolingAsyncValueTaskMethodBuilderTests.cs

@@ -390,7 +390,7 @@ public static async Task Generic_UsedWithAsyncMethod_CompletesSuccessfully(int y
             Assert.Equal(42 + yields, await ValueTaskReturningAsyncMethod(42));
             Assert.Equal(84 + yields, await ValueTaskReturningAsyncMethod(84));
 
-            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<int>))]
+            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<>))]
             async ValueTask<int> ValueTaskReturningAsyncMethod(int result)
             {
                 for (int i = 0; i < yields; i++)
@@ -440,7 +440,7 @@ async ValueTask ValueTaskReturningMethod()
                 }
             }
 
-            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<int>))]
+            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<>))]
             async ValueTask<int> ValueTaskInt32ReturningMethod()
             {
                 for (int i = 0; i < 3; i++)
@@ -499,7 +499,7 @@ await Task.WhenAll(Enumerable.Range(0, Environment.ProcessorCount).Select(async
                 {
                     Assert.Equal(42 + i, await ValueTaskAsync(i));
 
-                    [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<int>))]
+                    [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<>))]
                     static async ValueTask<int> ValueTaskAsync(int i)
                     {
                         await Task.Delay(1);
@@ -549,7 +549,7 @@ public void PoolingAsyncValueTasksBuilder_ObjectsPooled(string limitEnvVar)
                 Assert.InRange(boxes.Distinct().Count(), 1, boxes.Count - 1);
             }, new RemoteInvokeOptions() { StartInfo = psi }).Dispose();
 
-            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<int>))]
+            [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<>))]
             static async ValueTask<int> ComputeAsync(int input, ConcurrentQueue<object> boxes)
             {
                 await RecursiveValueTaskAsync(3, boxes);

src/tests/Loader/AssemblyLoadContext30Extensions/AssemblyLoadContext30Extensions.cs

@@ -1,5 +1,6 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
+
 using System;
 using System.Reflection;
 using System.Reflection.Emit;
@@ -218,7 +219,7 @@ public static void GetLoadContextForDynamicAssembly(bool isCollectible)
                 assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.RunAndCollect);
             }
 
-            AssemblyLoadContext? context = AssemblyLoadContext.GetLoadContext(assemblyBuilder);
+            AssemblyLoadContext context = AssemblyLoadContext.GetLoadContext(assemblyBuilder);
 
             Assert(context != null);
             Assert(alc == context);

src/tests/profiler/eventpipe/eventpipe.cs

@@ -3,6 +3,7 @@
 
 using Profiler.Tests;
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Diagnostics.Tracing;
@@ -35,6 +36,8 @@ public static int Main(string[] args)
 
         public static int RunTest()
         {
+            ArrayPool<char>.Shared.Rent(1); // workaround for https://github.com/dotnet/runtime/issues/1892
+
             bool success = true;
             int allTypesEventCount = 0;
             int arrayTypeEventCount = 0;