Add solution suggested by @fhammerl

images/Dockerfile

@@ -2,7 +2,7 @@ FROM mcr.microsoft.com/dotnet/runtime-deps:6.0 as build
 
 ARG RUNNER_VERSION
 ARG RUNNER_ARCH="x64"
-ARG RUNNER_CONTAINER_HOOKS_VERSION=0.3.2
+ARG RUNNER_CONTAINER_HOOKS_VERSION=0.3.1
 ARG DOCKER_VERSION=20.10.23
 
 RUN apt update -y && apt install curl unzip -y

src/Runner.Common/JobServerQueue.cs

@@ -818,7 +818,6 @@ namespace GitHub.Runner.Common
 
             return mergedRecords;
         }
-
         private async Task UploadFile(UploadFileInfo file)
         {
             bool uploadSucceed = false;

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -137,7 +137,7 @@ namespace GitHub.Runner.Listener.Configuration
                     GitHubAuthResult authResult = await GetTenantCredential(inputUrl, registerToken, Constants.RunnerEvent.Register);
                     runnerSettings.ServerUrl = authResult.TenantUrl;
                     runnerSettings.UseV2Flow = authResult.UseV2Flow;
-                    Trace.Info($"Using V2 flow: {runnerSettings.UseV2Flow}");
+                    _term.WriteLine($"Using V2 flow: {runnerSettings.UseV2Flow}");
                     creds = authResult.ToVssCredentials();
                     Trace.Info("cred retrieved via GitHub auth");
                 }

src/Runner.Worker/Container/ContainerHooks/HookInput.cs

@@ -83,7 +83,7 @@ namespace GitHub.Runner.Worker.Container.ContainerHooks
         public HookContainer(ContainerInfo container)
         {
             Image = container.ContainerImage;
-            EntryPointArgs = container.ContainerEntryPointArgs?.Split(' ').Select(arg => arg.Trim()).Where(arg => !string.IsNullOrEmpty(arg)) ?? new List<string>();
+            EntryPointArgs = container.ContainerEntryPointArgs?.Split(' ').Select(arg => arg.Trim()) ?? new List<string>();
             EntryPoint = container.ContainerEntryPoint;
             WorkingDirectory = container.ContainerWorkDirectory;
             CreateOptions = container.ContainerCreateOptions;

src/Runner.Worker/JobRunner.cs

@@ -150,11 +150,6 @@ namespace GitHub.Runner.Worker
                 _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
                 jobContext.SetRunnerContext("name", _runnerSettings.AgentName);
 
-                if (jobContext.Global.Variables.TryGetValue(WellKnownDistributedTaskVariables.RunnerEnvironment, out var runnerEnvironment))
-                {
-                    jobContext.SetRunnerContext("environment", runnerEnvironment);
-                }
-
                 string toolsDirectory = HostContext.GetDirectory(WellKnownDirectory.Tools);
                 Directory.CreateDirectory(toolsDirectory);
                 jobContext.SetRunnerContext("tool_cache", toolsDirectory);

src/Sdk/DTObjectTemplating/ObjectTemplating/TemplateContext.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
@@ -163,7 +163,6 @@ namespace GitHub.DistributedTask.ObjectTemplating
                 message = $"{prefix} {message}";
             }
 
-            Errors.Add(message);
             TraceWriter.Error(message);
         }
 

src/Sdk/DTWebApi/WebApi/WellKnownDistributedTaskVariables.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace GitHub.DistributedTask.WebApi
 {
@@ -6,6 +6,5 @@ namespace GitHub.DistributedTask.WebApi
     {
         public static readonly String JobId = "system.jobId";
         public static readonly String RunnerLowDiskspaceThreshold = "system.runner.lowdiskspacethreshold";
-        public static readonly String RunnerEnvironment = "system.runnerEnvironment";
     }
 }

src/Test/L0/Sdk/DTObjectTemplating/TemplateContextL0.cs

@@ -1,57 +0,0 @@
-using System;
-using System.Collections.Generic;
-using GitHub.DistributedTask.ObjectTemplating.Tokens;
-using Xunit;
-
-namespace GitHub.DistributedTask.ObjectTemplating.Tests
-{
-    public sealed class TemplateContextL0
-    {
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void VerifyError()
-        {
-            TemplateContext context = buildContext();
-            TemplateToken value = new StringToken(1, 1, 1, "some-token");
-            System.Exception ex = new System.Exception();
-
-            List<TemplateValidationError> expectedErrors = new();
-            expectedErrors.Add(new TemplateValidationError("(Line: 1, Col: 1): Exception of type 'System.Exception' was thrown."));
-
-            context.Error(value, ex);
-
- 
-            Assert.True(expectedErrors.SequenceEqual(toList(context.Errors.GetEnumerator())));
-
-
-            Assert.True(true);
-        }
-
-        private TemplateContext buildContext()
-        {
-            return new TemplateContext
-            {
-                // CancellationToken = CancellationToken.None,
-                Errors = new TemplateValidationErrors(10, int.MaxValue), // Don't truncate error messages otherwise we might not scrub secrets correctly
-                Memory = new TemplateMemory(
-                maxDepth: 100,
-                maxEvents: 1000000,
-                maxBytes: 10 * 1024 * 1024),
-                Schema = null,
-                TraceWriter = new EmptyTraceWriter(),
-            };
-        }
-
-        private List<TemplateValidationError> toList(IEnumerator<TemplateValidationError> enumerator)
-        {
-            List<TemplateValidationError> result = new();
-            while (enumerator.MoveNext())
-            {
-                TemplateValidationError err = enumerator.Current;
-                result.Add(err);
-            }
-            return result;
-        }
-    }
-}