runtime-async

[tom-englert]

Support the new runtime-async feature of DotNet11

[Copilot]

Pull request overview

This PR introduces an initial experiment to evaluate .NET 11 “runtime-async” output and updates the ConfigureAwait weaver + test suite to handle the new compiler/runtime async pattern (AsyncHelpers-based) alongside existing state-machine rewriting.

Changes:

• Multi-target AssemblyToProcess and Tests to net10.0 + net11.0, enabling preview/runtime-async features for net11.0.
• Extend the weaver to detect/handle “compiler service” async (runtime-async) by rewriting System.Runtime.CompilerServices.AsyncHelpers.Await(...) call sites.
• Update/expand tests and verified IL baselines to cover ValueTask/runtime-async scenarios; update package versions and CI SDK installation.

Reviewed changes

Copilot reviewed 34 out of 35 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
Tests/xunit.runner.json	Disables xUnit parallelization for more deterministic runs.
Tests/Tests.csproj	Adds net10.0/net11.0, upgrades test packages, copies runner config.
Tests/ModuleWeaverTests.DecompileIssue1.Debug.DotNet.verified.txt	Updates verified IL baseline for new output/runtime changes.
Tests/ModuleWeaverTests.DecompileGenericMethod.Debug.DotNet.verified.txt	Updates verified IL baseline reflecting runtime-async patterns.
Tests/ModuleWeaverTests.DecompileGenericClass.Debug.DotNet.verified.txt	Updates verified IL baseline reflecting runtime-async/ValueTask changes.
Tests/ModuleWeaverTests.DecompileExample.Debug.Net.verified.txt	Updates verified IL baseline (Configured* awaiters, etc.).
Tests/ModuleWeaverTests.DecompileCatchAndFinally.Debug.Net.verified.txt	Updates verified IL baseline (Configured* awaiters, etc.).
Tests/ModuleWeaverTests.DecompileCatchAndFinally.Debug.DotNet.verified.txt	Updates verified IL baseline reflecting runtime-async patterns.
Tests/ModuleWeaverTests.cs	Adjusts test bootstrap for updated xUnit/Fody APIs.
Tests/MethodWithUsing.cs	Adds ValueTask variant test under #if NET.
Tests/MethodWithAttributeTests.cs	Adds ValueTask variant test under #if NET.
Tests/DoNotWeaveTests.cs	Adds ValueTask variant coverage under #if NET.
Tests/ClassWithAttributeTests.cs	Adds ValueTask variant coverage under #if NET.
Tests/CatchAndFinallyTests.cs	New test coverage for Catch/Finally scenarios + ValueTask variants.
global.json	Removes SDK pinning.
Directory.Build.props	Sets C# LangVersion to 13 and keeps common build settings.
ConfigureAwait/ConfigureAwait.csproj	Bumps Fody/FodyPackaging versions.
ConfigureAwait.sln.DotSettings	Updates user dictionary entries (IDE settings).
ConfigureAwait.Fody/ModuleWeaver.cs	Adds runtime-async processing path and tightens method redirection rules.
ConfigureAwait.Fody/ModuleWeaver_TypeFinder.cs	Renames/refocuses type discovery to runtime-related types.
ConfigureAwait.Fody/ModuleWeaver_CompilerServices.cs	New IL rewriting for AsyncHelpers.Await(...)-based async (runtime-async).
ConfigureAwait.Fody/ConfigureAwait.Fody.csproj	Bumps FodyHelpers version.
ConfigureAwait.Fody/CecilExtensions.cs	Adds runtime-async detection helpers + refactors attribute checks.
AssemblyToProcess/MethodWithUsing.cs	Expands conditional compilation from NETCOREAPP2_0 to NET.
AssemblyToProcess/MethodWithAttribute.cs	Expands conditional compilation from NETCOREAPP2_0 to NET.
AssemblyToProcess/Issue1.cs	Updates ValueTask + nullable string usage for ReadLineAsync.
AssemblyToProcess/GenericIssue.cs	Expands conditional compilation from NETCOREAPP2_0 to NET.
AssemblyToProcess/FlagSynchronizationContext.cs	Formatting change (single-line base type).
AssemblyToProcess/Example.cs	Expands conditional compilation from NETCOREAPP2_0 to NET.
AssemblyToProcess/DoNotWeave.cs	Uses a non-trivial async path to avoid optimizations; adds helper Return10.
AssemblyToProcess/ClassWithAttribute.cs	Uses a non-trivial async path to avoid optimizations; adds helper Return10.
AssemblyToProcess/CatchAndFinally.cs	Expands conditional compilation from NETCOREAPP2_0 to NET and adds ValueTask methods.
AssemblyToProcess/AssemblyToProcess.csproj	Adds net10.0/net11.0; enables preview/runtime-async feature flags for net11.0.
appveyor.yml	Installs .NET 10 + .NET 11 preview SDKs explicitly (no global.json).

Comments suppressed due to low confidence (1)

AssemblyToProcess/CatchAndFinally.cs:83

• The methods inside the #if NET block are indented an extra level compared to the rest of the class, which makes the file hard to read and looks accidental. Align the indentation of these method declarations with the other members in the class.

#if NET
        public async Task Catch1_WithValueTask()
        {
            try
            {

---

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[Copilot]

Pull request overview

Copilot reviewed 33 out of 34 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

AssemblyToProcess/CatchAndFinally.cs:83

• The #if NET block is indented as if it were nested, but it’s at class scope. This inconsistent indentation makes the file harder to read and can obscure brace/region structure; align these method declarations with the rest of the class members.

#if NET
        public async Task Catch1_WithValueTask()
        {
            try
            {

---

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[Copilot]

Pull request overview

Copilot reviewed 33 out of 34 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 95 out of 114 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

AssemblyToProcess/CatchAndFinally.cs:90

• Inside the #if NET region, the method declarations are indented by an extra level compared to the rest of the class, which makes the file inconsistent and harder to scan. Align the indentation of the NET-only methods with the surrounding methods in the class.

#if NET
        public async Task Catch1_WithValueTask()
        {
            try
            {
                throw new NotImplementedException();
            }
            catch
            {
                await new ValueTask(Task.Delay(1));
            }
        }

---

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