Fix NRE when default value is null and ServiceCallSite is not found (#44877)

Author: maryamariyan

src/libraries/Microsoft.Extensions.DependencyInjection/Directory.Build.props

@@ -0,0 +1,7 @@
+<Project>
+  <Import Project="..\Directory.Build.props" />
+  <PropertyGroup>
+    <PackageVersion>5.0.1</PackageVersion>
+    <AssemblyVersion>5.0.0.1</AssemblyVersion>
+  </PropertyGroup>
+</Project>

src/libraries/Microsoft.Extensions.DependencyInjection/src/ServiceLookup/ConstantCallSite.cs

@@ -7,10 +7,12 @@ namespace Microsoft.Extensions.DependencyInjection.ServiceLookup
 {
     internal class ConstantCallSite : ServiceCallSite
     {
+        private readonly Type _serviceType;
         internal object DefaultValue { get; }
 
         public ConstantCallSite(Type serviceType, object defaultValue): base(ResultCache.None)
         {
+            _serviceType = serviceType ?? throw new ArgumentNullException(nameof(serviceType));
             if (defaultValue != null && !serviceType.IsInstanceOfType(defaultValue))
             {
                 throw new ArgumentException(SR.Format(SR.ConstantCantBeConvertedToServiceType, defaultValue.GetType(), serviceType));
@@ -19,8 +21,8 @@ public ConstantCallSite(Type serviceType, object defaultValue): base(ResultCache
             DefaultValue = defaultValue;
         }
 
-        public override Type ServiceType => DefaultValue.GetType();
-        public override Type ImplementationType => DefaultValue.GetType();
+        public override Type ServiceType => DefaultValue?.GetType() ?? _serviceType;
+        public override Type ImplementationType => DefaultValue?.GetType() ?? _serviceType;
         public override CallSiteKind Kind { get; } = CallSiteKind.Constant;
     }
 }

src/libraries/Microsoft.Extensions.DependencyInjection/tests/DI.Tests/CallSiteTests.cs

@@ -264,6 +264,37 @@ public void DoesNotThrowWhenServiceIsUsedAsEnumerableAndNotInOneCallSite()
             Assert.NotNull(compileCallSite);
         }
 
+        [Theory]
+        [InlineData(ServiceProviderMode.Default)]
+        [InlineData(ServiceProviderMode.Dynamic)]
+        [InlineData(ServiceProviderMode.Runtime)]
+        [InlineData(ServiceProviderMode.Expressions)]
+        [InlineData(ServiceProviderMode.ILEmit)]
+        private void NoServiceCallsite_DefaultValueNull_DoesNotThrow(ServiceProviderMode mode)
+        {
+            var descriptors = new ServiceCollection();
+            descriptors.AddTransient<ServiceG>();
+
+            var provider = descriptors.BuildServiceProvider(mode);
+            ServiceF instance = ActivatorUtilities.CreateInstance<ServiceF>(provider);
+
+            Assert.NotNull(instance);
+        }
+
+        private interface IServiceG
+        {
+        }
+
+        private class ServiceG
+        {
+            public ServiceG(IServiceG service = null) { }
+        }
+
+        private class ServiceF
+        {
+            public ServiceF(ServiceG service) { }
+        }
+
         private class ServiceD
         {
             public ServiceD(IEnumerable<ServiceA> services)

src/libraries/Microsoft.Extensions.DependencyInjection/tests/DI.Tests/ServiceProviderCompilationTest.cs

@@ -12,6 +12,7 @@ namespace Microsoft.Extensions.DependencyInjection.Tests
     public class ServiceProviderCompilationTest
     {
         [Theory]
+        [InlineData(ServiceProviderMode.Default, typeof(I999))]
         [InlineData(ServiceProviderMode.Dynamic, typeof(I999))]
         [InlineData(ServiceProviderMode.Runtime, typeof(I999))]
         [InlineData(ServiceProviderMode.ILEmit, typeof(I999))]

src/libraries/libraries-packages.proj

@@ -19,6 +19,7 @@
     <ProjectReference Include="$(MSBuildThisFileDirectory)*\pkg\**\*.pkgproj" Condition="('$(BuildAllConfigurations)' == 'true' or '$(DotNetBuildFromSource)' == 'true') And '$(BuildAllOOBPackages)' == 'true'" />
     <!-- If setting BuildAllOOBPackages to false, add bellow the individual OOB packages you want to continue to build -->
     <ProjectReference Include="$(LibrariesProjectRoot)\System.IO.Pipelines\pkg\System.IO.Pipelines.pkgproj" Condition="'$(BuildAllConfigurations)' == 'true'" />
+    <ProjectReference Include="$(LibrariesProjectRoot)\Microsoft.Extensions.DependencyInjection\pkg\Microsoft.Extensions.DependencyInjection.pkgproj" Condition="'$(BuildAllConfigurations)' == 'true'" />
     <ProjectReference Include="$(LibrariesProjectRoot)\System.Security.Cryptography.Pkcs\pkg\System.Security.Cryptography.Pkcs.pkgproj" Condition="'$(BuildAllConfigurations)' == 'true'" />
   </ItemGroup>
 

src/libraries/pkg/baseline/packageIndex.json

@@ -507,11 +507,20 @@
         "3.1.0",
         "3.1.1",
         "3.1.2",
+        "3.1.3",
+        "3.1.4",
+        "3.1.5",
+        "3.1.6",
+        "3.1.7",
+        "3.1.8",
+        "3.1.9",
+        "3.1.10",
         "5.0.0"
       ],
       "InboxOn": {},
       "AssemblyVersionInPackageVersion": {
-        "5.0.0.0": "5.0.0"
+        "5.0.0.0": "5.0.0",
+        "5.0.0.1": "5.0.1"
       }
     },
     "Microsoft.Extensions.DependencyInjection.Abstractions": {