dotnet · jozkee · Jun 11, 2025 · May 19, 2025 · May 21, 2025 · May 21, 2025
diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
@@ -15,7 +15,7 @@
       ]
     },
     "microsoft.dotnet.xharness.cli": {
-      "version": "9.0.0-prerelease.25228.2",
+      "version": "9.0.0-prerelease.25269.3",
       "commands": [
         "xharness"
       ]

diff --git a/NuGet.config b/NuGet.config
@@ -13,7 +13,7 @@
     <!--  End: Package sources from dotnet-emsdk -->
     <!--  Begin: Package sources from dotnet-sdk -->
 
-    <add key="darc-pub-dotnet-sdk-b562a30" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-sdk-b562a300/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-sdk-38e51fe" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-sdk-38e51fe4/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-sdk -->
     <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <!--

diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
diff --git a/eng/Versions.props b/eng/Versions.props
@@ -44,9 +44,9 @@
       Any tools that contribute to the design-time experience should use the MicrosoftCodeAnalysisVersion_LatestVS property above to ensure
       they do not break the local dev experience.
     -->
-    <MicrosoftCodeAnalysisCSharpVersion>4.12.0-3.25256.6</MicrosoftCodeAnalysisCSharpVersion>
-    <MicrosoftCodeAnalysisVersion>4.12.0-3.25256.6</MicrosoftCodeAnalysisVersion>
-    <MicrosoftNetCompilersToolsetVersion>4.12.0-3.25256.6</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftCodeAnalysisCSharpVersion>4.12.0-3.25275.3</MicrosoftCodeAnalysisCSharpVersion>
+    <MicrosoftCodeAnalysisVersion>4.12.0-3.25275.3</MicrosoftCodeAnalysisVersion>
+    <MicrosoftNetCompilersToolsetVersion>4.12.0-3.25275.3</MicrosoftNetCompilersToolsetVersion>
   </PropertyGroup>
   <!--
     For source generator support we need to target multiple versions of Roslyn in order to be able to run on older versions of Roslyn.
@@ -85,22 +85,22 @@
     <!-- SDK dependencies (also used in wasm build tests -->
     <MicrosoftDotNetApiCompatTaskVersion>9.0.107</MicrosoftDotNetApiCompatTaskVersion>
     <!-- Arcade dependencies -->
-    <MicrosoftDotNetBuildTasksFeedVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksFeedVersion>
-    <MicrosoftDotNetCodeAnalysisVersion>9.0.0-beta.25255.5</MicrosoftDotNetCodeAnalysisVersion>
-    <MicrosoftDotNetGenAPIVersion>9.0.0-beta.25255.5</MicrosoftDotNetGenAPIVersion>
-    <MicrosoftDotNetGenFacadesVersion>9.0.0-beta.25255.5</MicrosoftDotNetGenFacadesVersion>
-    <MicrosoftDotNetXUnitAssertVersion>2.9.0-beta.25255.5</MicrosoftDotNetXUnitAssertVersion>
-    <MicrosoftDotNetXUnitExtensionsVersion>9.0.0-beta.25255.5</MicrosoftDotNetXUnitExtensionsVersion>
-    <MicrosoftDotNetXUnitConsoleRunnerVersion>2.9.0-beta.25255.5</MicrosoftDotNetXUnitConsoleRunnerVersion>
-    <MicrosoftDotNetBuildTasksArchivesVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksArchivesVersion>
-    <MicrosoftDotNetBuildTasksInstallersVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksInstallersVersion>
-    <MicrosoftDotNetBuildTasksPackagingVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksPackagingVersion>
-    <MicrosoftDotNetBuildTasksTargetFrameworkVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksTargetFrameworkVersion>
-    <MicrosoftDotNetBuildTasksTemplatingVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksTemplatingVersion>
-    <MicrosoftDotNetBuildTasksWorkloadsPackageVersion>9.0.0-beta.25255.5</MicrosoftDotNetBuildTasksWorkloadsPackageVersion>
-    <MicrosoftDotNetRemoteExecutorVersion>9.0.0-beta.25255.5</MicrosoftDotNetRemoteExecutorVersion>
-    <MicrosoftDotNetVersionToolsTasksVersion>9.0.0-beta.25255.5</MicrosoftDotNetVersionToolsTasksVersion>
-    <MicrosoftDotNetPackageTestingVersion>9.0.0-beta.25255.5</MicrosoftDotNetPackageTestingVersion>
+    <MicrosoftDotNetBuildTasksFeedVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksFeedVersion>
+    <MicrosoftDotNetCodeAnalysisVersion>9.0.0-beta.25302.2</MicrosoftDotNetCodeAnalysisVersion>
+    <MicrosoftDotNetGenAPIVersion>9.0.0-beta.25302.2</MicrosoftDotNetGenAPIVersion>
+    <MicrosoftDotNetGenFacadesVersion>9.0.0-beta.25302.2</MicrosoftDotNetGenFacadesVersion>
+    <MicrosoftDotNetXUnitAssertVersion>2.9.0-beta.25302.2</MicrosoftDotNetXUnitAssertVersion>
+    <MicrosoftDotNetXUnitExtensionsVersion>9.0.0-beta.25302.2</MicrosoftDotNetXUnitExtensionsVersion>
+    <MicrosoftDotNetXUnitConsoleRunnerVersion>2.9.0-beta.25302.2</MicrosoftDotNetXUnitConsoleRunnerVersion>
+    <MicrosoftDotNetBuildTasksArchivesVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksArchivesVersion>
+    <MicrosoftDotNetBuildTasksInstallersVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksInstallersVersion>
+    <MicrosoftDotNetBuildTasksPackagingVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksPackagingVersion>
+    <MicrosoftDotNetBuildTasksTargetFrameworkVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksTargetFrameworkVersion>
+    <MicrosoftDotNetBuildTasksTemplatingVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksTemplatingVersion>
+    <MicrosoftDotNetBuildTasksWorkloadsPackageVersion>9.0.0-beta.25302.2</MicrosoftDotNetBuildTasksWorkloadsPackageVersion>
+    <MicrosoftDotNetRemoteExecutorVersion>9.0.0-beta.25302.2</MicrosoftDotNetRemoteExecutorVersion>
+    <MicrosoftDotNetVersionToolsTasksVersion>9.0.0-beta.25302.2</MicrosoftDotNetVersionToolsTasksVersion>
+    <MicrosoftDotNetPackageTestingVersion>9.0.0-beta.25302.2</MicrosoftDotNetPackageTestingVersion>
     <!-- TODO: Remove pinned xunit.analyzers version: https://github.com/dotnet/runtime/issues/97088 -->
     <XUnitAnalyzersVersion>1.4.0</XUnitAnalyzersVersion>
     <!-- NuGet dependencies -->
@@ -141,20 +141,20 @@
     <SystemReflectionMetadataToolsetVersion>8.0.0</SystemReflectionMetadataToolsetVersion>
     <SystemReflectionMetadataLoadContextToolsetVersion>8.0.0</SystemReflectionMetadataLoadContextToolsetVersion>
     <!-- Runtime-Assets dependencies -->
-    <SystemRuntimeNumericsTestDataVersion>9.0.0-beta.25211.3</SystemRuntimeNumericsTestDataVersion>
-    <SystemComponentModelTypeConverterTestDataVersion>9.0.0-beta.25211.3</SystemComponentModelTypeConverterTestDataVersion>
-    <SystemDataCommonTestDataVersion>9.0.0-beta.25211.3</SystemDataCommonTestDataVersion>
-    <SystemDrawingCommonTestDataVersion>9.0.0-beta.25211.3</SystemDrawingCommonTestDataVersion>
-    <SystemFormatsTarTestDataVersion>9.0.0-beta.25211.3</SystemFormatsTarTestDataVersion>
-    <SystemIOCompressionTestDataVersion>9.0.0-beta.25211.3</SystemIOCompressionTestDataVersion>
-    <SystemIOPackagingTestDataVersion>9.0.0-beta.25211.3</SystemIOPackagingTestDataVersion>
-    <SystemNetTestDataVersion>9.0.0-beta.25211.3</SystemNetTestDataVersion>
-    <SystemPrivateRuntimeUnicodeDataVersion>9.0.0-beta.25211.3</SystemPrivateRuntimeUnicodeDataVersion>
-    <SystemRuntimeTimeZoneDataVersion>9.0.0-beta.25211.3</SystemRuntimeTimeZoneDataVersion>
-    <SystemSecurityCryptographyX509CertificatesTestDataVersion>9.0.0-beta.25211.3</SystemSecurityCryptographyX509CertificatesTestDataVersion>
-    <SystemTextRegularExpressionsTestDataVersion>9.0.0-beta.25211.3</SystemTextRegularExpressionsTestDataVersion>
-    <SystemWindowsExtensionsTestDataVersion>9.0.0-beta.25211.3</SystemWindowsExtensionsTestDataVersion>
-    <MicrosoftDotNetCilStripSourcesVersion>9.0.0-beta.25211.3</MicrosoftDotNetCilStripSourcesVersion>
+    <SystemRuntimeNumericsTestDataVersion>9.0.0-beta.25266.2</SystemRuntimeNumericsTestDataVersion>
+    <SystemComponentModelTypeConverterTestDataVersion>9.0.0-beta.25266.2</SystemComponentModelTypeConverterTestDataVersion>
+    <SystemDataCommonTestDataVersion>9.0.0-beta.25266.2</SystemDataCommonTestDataVersion>
+    <SystemDrawingCommonTestDataVersion>9.0.0-beta.25266.2</SystemDrawingCommonTestDataVersion>
+    <SystemFormatsTarTestDataVersion>9.0.0-beta.25266.2</SystemFormatsTarTestDataVersion>
+    <SystemIOCompressionTestDataVersion>9.0.0-beta.25266.2</SystemIOCompressionTestDataVersion>
+    <SystemIOPackagingTestDataVersion>9.0.0-beta.25266.2</SystemIOPackagingTestDataVersion>
+    <SystemNetTestDataVersion>9.0.0-beta.25266.2</SystemNetTestDataVersion>
+    <SystemPrivateRuntimeUnicodeDataVersion>9.0.0-beta.25266.2</SystemPrivateRuntimeUnicodeDataVersion>
+    <SystemRuntimeTimeZoneDataVersion>9.0.0-beta.25266.2</SystemRuntimeTimeZoneDataVersion>
+    <SystemSecurityCryptographyX509CertificatesTestDataVersion>9.0.0-beta.25266.2</SystemSecurityCryptographyX509CertificatesTestDataVersion>
+    <SystemTextRegularExpressionsTestDataVersion>9.0.0-beta.25266.2</SystemTextRegularExpressionsTestDataVersion>
+    <SystemWindowsExtensionsTestDataVersion>9.0.0-beta.25266.2</SystemWindowsExtensionsTestDataVersion>
+    <MicrosoftDotNetCilStripSourcesVersion>9.0.0-beta.25266.2</MicrosoftDotNetCilStripSourcesVersion>
     <!-- dotnet-optimization dependencies -->
     <optimizationwindows_ntx64MIBCRuntimeVersion>1.0.0-prerelease.24462.2</optimizationwindows_ntx64MIBCRuntimeVersion>
     <optimizationwindows_ntx86MIBCRuntimeVersion>1.0.0-prerelease.24462.2</optimizationwindows_ntx86MIBCRuntimeVersion>
@@ -184,9 +184,9 @@
     <!-- Testing -->
     <MicrosoftNETCoreCoreDisToolsVersion>1.4.0</MicrosoftNETCoreCoreDisToolsVersion>
     <MicrosoftNETTestSdkVersion>17.4.0-preview-20220707-01</MicrosoftNETTestSdkVersion>
-    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>9.0.0-prerelease.25228.2</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
-    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>9.0.0-prerelease.25228.2</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
-    <MicrosoftDotNetXHarnessCLIVersion>9.0.0-prerelease.25228.2</MicrosoftDotNetXHarnessCLIVersion>
+    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>9.0.0-prerelease.25269.3</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
+    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>9.0.0-prerelease.25269.3</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
+    <MicrosoftDotNetXHarnessCLIVersion>9.0.0-prerelease.25269.3</MicrosoftDotNetXHarnessCLIVersion>
     <MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>9.0.0-alpha.0.25209.2</MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>
     <NUnitVersion>3.12.0</NUnitVersion>
     <NUnit3TestAdapterVersion>4.5.0</NUnit3TestAdapterVersion>
@@ -215,11 +215,11 @@
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>9.0.0-preview-20241010.1</MicrosoftPrivateIntellisenseVersion>
     <!-- Mono Cecil -->
-    <MicrosoftDotNetCecilVersion>0.11.5-alpha.25228.2</MicrosoftDotNetCecilVersion>
+    <MicrosoftDotNetCecilVersion>0.11.5-alpha.25275.2</MicrosoftDotNetCecilVersion>
     <!-- ILCompiler -->
     <MicrosoftDotNetILCompilerVersion>9.0.0-rtm.24511.16</MicrosoftDotNetILCompilerVersion>
     <!-- ICU -->
-    <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.25258.1</MicrosoftNETCoreRuntimeICUTransportVersion>
+    <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.25304.1</MicrosoftNETCoreRuntimeICUTransportVersion>
     <MicrosoftNETCoreRuntimeICUTransportVersion>9.0.0-rtm.24466.4</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- MsQuic -->
     <MicrosoftNativeQuicMsQuicSchannelVersion>2.4.8</MicrosoftNativeQuicMsQuicSchannelVersion>
@@ -263,7 +263,7 @@
     <MicrosoftSymbolStoreVersion>1.0.406601</MicrosoftSymbolStoreVersion>
     <!-- sdk version, for testing workloads -->
     <!-- <SdkVersionForWorkloadTesting>$(MicrosoftDotNetApiCompatTaskVersion)</SdkVersionForWorkloadTesting> -->
-    <SdkVersionForWorkloadTesting>9.0.105</SdkVersionForWorkloadTesting>
+    <SdkVersionForWorkloadTesting>9.0.106</SdkVersionForWorkloadTesting>
     <runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion>9.0.0-alpha.1.24175.1</runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion>
     <EmsdkPackageVersion>$(MicrosoftNETRuntimeEmscriptenVersion)</EmsdkPackageVersion>
     <NodePackageVersion>$(runtimewinx64MicrosoftNETCoreRuntimeWasmNodeTransportPackageVersion)</NodePackageVersion>

diff --git a/eng/common/core-templates/post-build/post-build.yml b/eng/common/core-templates/post-build/post-build.yml
@@ -44,6 +44,11 @@ parameters:
     displayName: Publish installers and checksums
     type: boolean
     default: true
+
+  - name: requireDefaultChannels
+    displayName: Fail the build if there are no default channel(s) registrations for the current build
+    type: boolean
+    default: false
 
   - name: SDLValidationParameters
     type: object
@@ -312,5 +317,6 @@ stages:
               -PublishingInfraVersion ${{ parameters.publishingInfraVersion }}
               -AzdoToken '$(System.AccessToken)'
               -WaitPublishingFinish true
+              -RequireDefaultChannels ${{ parameters.requireDefaultChannels }}
               -ArtifactsPublishingAdditionalParameters '${{ parameters.artifactsPublishingAdditionalParameters }}'
               -SymbolPublishingAdditionalParameters '${{ parameters.symbolPublishingAdditionalParameters }}'
diff --git a/eng/common/post-build/publish-using-darc.ps1 b/eng/common/post-build/publish-using-darc.ps1
@@ -5,7 +5,8 @@ param(
   [Parameter(Mandatory=$false)][string] $MaestroApiEndPoint = 'https://maestro.dot.net',
   [Parameter(Mandatory=$true)][string] $WaitPublishingFinish,
   [Parameter(Mandatory=$false)][string] $ArtifactsPublishingAdditionalParameters,
-  [Parameter(Mandatory=$false)][string] $SymbolPublishingAdditionalParameters
+  [Parameter(Mandatory=$false)][string] $SymbolPublishingAdditionalParameters,
+  [Parameter(Mandatory=$false)][string] $RequireDefaultChannels
 )
 
 try {
@@ -33,6 +34,10 @@ try {
   if ("false" -eq $WaitPublishingFinish) {
     $optionalParams.Add("--no-wait") | Out-Null
   }
+
+  if ("true" -eq $RequireDefaultChannels) {
+    $optionalParams.Add("--default-channels-required") | Out-Null
+  }
 
   & $darc add-build-to-channel `
     --id $buildId `

diff --git a/global.json b/global.json
@@ -1,16 +1,16 @@
 {
   "sdk": {
-    "version": "9.0.105",
+    "version": "9.0.106",
     "allowPrerelease": true,
     "rollForward": "major"
   },
   "tools": {
-    "dotnet": "9.0.105"
+    "dotnet": "9.0.106"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25255.5",
-    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25255.5",
-    "Microsoft.DotNet.SharedFramework.Sdk": "9.0.0-beta.25255.5",
+    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25302.2",
+    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25302.2",
+    "Microsoft.DotNet.SharedFramework.Sdk": "9.0.0-beta.25302.2",
     "Microsoft.Build.NoTargets": "3.7.0",
     "Microsoft.Build.Traversal": "3.4.0",
     "Microsoft.NET.Sdk.IL": "9.0.0-rtm.24511.16"

diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
@@ -10717,6 +10717,14 @@ size_t gc_heap::sort_mark_list()
         size_t region_index = get_basic_region_index_for_address (heap_segment_mem (region));
         uint8_t* region_limit = heap_segment_allocated (region);
 
+        // Due to GC holes, x can point to something in a region that already got freed. And that region's
+        // allocated would be 0 and cause an infinite loop which is much harder to handle on production than
+        // simply throwing an exception.
+        if (region_limit == 0)
+        {
+            FATAL_GC_ERROR();
+        }
+
         uint8_t*** mark_list_piece_start_ptr = &mark_list_piece_start[region_index];
         uint8_t*** mark_list_piece_end_ptr = &mark_list_piece_end[region_index];
 #else // USE_REGIONS

diff --git a/src/coreclr/jit/codegenxarch.cpp b/src/coreclr/jit/codegenxarch.cpp
@@ -6268,6 +6268,18 @@ void CodeGen::genCallInstruction(GenTreeCall* call X86_ARG(target_ssize_t stackA
         {
             retSize       = emitTypeSize(retTypeDesc->GetReturnRegType(0));
             secondRetSize = emitTypeSize(retTypeDesc->GetReturnRegType(1));
+
+            if (retTypeDesc->GetABIReturnReg(1, call->GetUnmanagedCallConv()) == REG_INTRET)
+            {
+                // If the second return register is REG_INTRET, then the first
+                // return is expected to be in a SIMD register.
+                // The emitter has hardcoded belief that retSize corresponds to
+                // REG_INTRET and secondRetSize to REG_INTRET_1, so fix up the
+                // situation here.
+                assert(!EA_IS_GCREF_OR_BYREF(retSize));
+                retSize       = secondRetSize;
+                secondRetSize = EA_UNKNOWN;
+            }
         }
         else
         {

diff --git a/src/coreclr/jit/gcencode.cpp b/src/coreclr/jit/gcencode.cpp
@@ -49,8 +49,21 @@ ReturnKind GCInfo::getReturnKind()
         case 1:
             return VarTypeToReturnKind(retTypeDesc.GetReturnRegType(0));
         case 2:
-            return GetStructReturnKind(VarTypeToReturnKind(retTypeDesc.GetReturnRegType(0)),
-                                       VarTypeToReturnKind(retTypeDesc.GetReturnRegType(1)));
+        {
+            var_types first = retTypeDesc.GetReturnRegType(0);
+            var_types second = retTypeDesc.GetReturnRegType(1);
+#ifdef UNIX_AMD64_ABI
+            if (varTypeUsesFloatReg(first))
+            {
+                // first does not consume an int register in this case so an obj/ref
+                // in the second ReturnKind would actually be found in the first int reg.
+                first = second;
+                second = TYP_UNDEF;
+            }
+#endif // UNIX_AMD64_ABI
+            return GetStructReturnKind(VarTypeToReturnKind(first),
+                                       VarTypeToReturnKind(second));
+        }
         default:
 #ifdef DEBUG
             for (unsigned i = 0; i < regCount; i++)

diff --git a/src/coreclr/jit/gentree.cpp b/src/coreclr/jit/gentree.cpp
@@ -30167,7 +30167,7 @@ unsigned* SsaNumInfo::GetOutlinedNumSlot(Compiler* compiler, unsigned index) con
     // Copy over all of the already encoded numbers.
     if (!baseNum.IsInvalid())
     {
-        for (int i = 0; i < SIMPLE_NUM_COUNT; i++)
+        for (int i = 0; i < count; i++)
         {
             pFirstSlot[i] = baseNum.GetNum(compiler, i);
         }

diff --git a/src/coreclr/jit/morphblock.cpp b/src/coreclr/jit/morphblock.cpp
@@ -250,8 +250,6 @@ void MorphInitBlockHelper::PropagateBlockAssertions()
 //
 void MorphInitBlockHelper::PropagateExpansionAssertions()
 {
-    // Consider doing this for FieldByField as well
-    //
     if (m_comp->optLocalAssertionProp && (m_transformationDecision == BlockTransformation::OneStoreBlock))
     {
         m_comp->fgAssertionGen(m_store);
@@ -408,6 +406,7 @@ void MorphInitBlockHelper::TryInitFieldByField()
         if (m_comp->fgGlobalMorph && m_dstLclNode->IsLastUse(i))
         {
             JITDUMP("Field-by-field init skipping write to dead field V%02u\n", fieldLclNum);
+            m_comp->fgKillDependentAssertionsSingle(m_dstLclNum DEBUGARG(m_store));
             continue;
         }
 
@@ -1236,6 +1235,7 @@ GenTree* MorphCopyBlockHelper::CopyFieldByField()
         {
             INDEBUG(unsigned dstFieldLclNum = m_comp->lvaGetDesc(m_dstLclNum)->lvFieldLclStart + i);
             JITDUMP("Field-by-field copy skipping write to dead field V%02u\n", dstFieldLclNum);
+            m_comp->fgKillDependentAssertionsSingle(m_dstLclNum DEBUGARG(m_store));
             continue;
         }
 

diff --git a/src/coreclr/vm/method.cpp b/src/coreclr/vm/method.cpp
@@ -1324,6 +1324,15 @@ ReturnKind MethodDesc::ParseReturnKindFromSig(INDEBUG(bool supportStringConstruc
                                     regKinds[i] = RT_Scalar;
                                 }
                             }
+
+                            if (eeClass->GetEightByteClassification(0) == SystemVClassificationTypeSSE)
+                            {
+                                // Skip over SSE types since they do not consume integer registers.
+                                // An obj/byref in the 2nd eight bytes will be in the first integer register.
+                                regKinds[0] = regKinds[1];
+                                regKinds[1] = RT_Scalar;
+                            }
+
                             ReturnKind structReturnKind = GetStructReturnKind(regKinds[0], regKinds[1]);
                             return structReturnKind;
                         }
@@ -3687,10 +3696,14 @@ MethodDesc::EnumMemoryRegions(CLRDataEnumMemoryFlags flags)
     ILCodeVersion ilVersion = pCodeVersionManager->GetActiveILCodeVersion(dac_cast<PTR_MethodDesc>(this));
     if (!ilVersion.IsNull())
     {
-        ilVersion.GetActiveNativeCodeVersion(dac_cast<PTR_MethodDesc>(this));
-        ilVersion.GetVersionId();
-        ilVersion.GetRejitState();
-        ilVersion.GetIL();
+        EX_TRY
+        {
+            ilVersion.GetActiveNativeCodeVersion(dac_cast<PTR_MethodDesc>(this));
+            ilVersion.GetVersionId();
+            ilVersion.GetRejitState();
+            ilVersion.GetIL();
+        }
+        EX_CATCH_RETHROW_ONLY_COR_E_OPERATIONCANCELLED
     }
 #endif