handle known test failures

Author: baronfel

.github/workflows/build.yml

@@ -5,11 +5,21 @@ on: [push, pull_request]
 jobs:
   build:
 
+    # FCS tests fail for netfx on macos/ubuntu, so we encode that here.
+    continue-on-error: ${{ matrix.knownFailure }}
+
     strategy:
       fail-fast: false
       matrix:
         os: [windows-latest, macos-latest, ubuntu-latest]
         dotnet: [3.1.301] # TODO: wish this action didn't pin versions...
+        include:
+          - os: windows-latest
+            knownFailure: false
+          - os: macos-latest
+            knownFailure: true
+          - os: ubuntu-latest
+            knownFailure: true
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -28,5 +38,5 @@ jobs:
       uses: actions/upload-artifact@v2
       if: always()
       with:
-        name: code-coverage-report
+        name: code-coverage-report-${{ matrix.os }}-${{ env.GITHUB_SHA }}
         path: ${{ github.workspace }}/artifacts/TestResults/Release/FSharp.Compiler.Service.Test.*.xml