Run the test suite with the Go tip version as well

.github/workflows/all.yml

@@ -85,6 +85,32 @@ jobs:
           fi
           go test "${args[@]}" -timeout 800s ./...
 
+  test-tip:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.x
+      - name: Install Go tip
+        run: |
+          go install golang.org/dl/gotip@latest
+          gotip download
+          echo "GOROOT=$HOME/sdk/gotip" >> "$GITHUB_ENV"
+          echo "GOPATH=$HOME/go" >> "$GITHUB_ENV"
+          echo "$HOME/go/bin" >> "$GITHUB_PATH"
+          echo "$HOME/sdk/gotip/bin" >> "$GITHUB_PATH"
+      - name: Run tests
+        run: |
+          set -x
+          which go
+          go version
+          export GOMAXPROCS=2
+          args=("-p" "2" "-race")
+          go test "${args[@]}" -timeout 800s ./...
+
   test-cov:
     strategy:
       matrix: