more diag

Author: Nigusu-Allehu

eng/pipelines/pr.yml

@@ -269,12 +269,24 @@ stages:
             targetType: "inline"
             script: |
               ./eng/dotnet-build/build.sh --source-build --binarylog
+        - bash: |
+            echo "=== dotnet version ===" && ./cli/dotnet --version
+            echo "=== ref pack System.Runtime.dll paths ===" && find ./cli/packs -name "System.Runtime.dll" 2>/dev/null
+            echo "=== FeatureSwitchDefinitionAttribute in ref assemblies ===" && \
+              find ./cli/packs -name "System.Runtime.dll" | while read dll; do
+                echo "--- $dll ---"
+                strings "$dll" | grep -i FeatureSwitch || echo "  NOT FOUND"
+              done
+            mkdir -p artifacts/diag
+            find ./cli/packs -name "System.Runtime.dll" -exec cp {} artifacts/diag/ \; 2>/dev/null || true
+          displayName: "Collect SDK diagnostics"
+          condition: failed()
         - task: PublishPipelineArtifact@1
-          displayName: Publish MSBuild Binary Logs
+          displayName: Publish MSBuild Binary Logs and SDK Diagnostics
           condition: failed()
           inputs:
-            targetPath: artifacts/log/Release
-            artifact: binlog - Source Build - Attempt $(System.JobAttempt)
+            targetPath: artifacts
+            artifact: diagnostics - Source Build - Attempt $(System.JobAttempt)
     - ${{ if eq(parameters.RunStaticAnalysis, true) }}:
       - job:
         displayName: Run Static Analysis