github actions

.github/workflows/ci.yml

@@ -0,0 +1,22 @@
+name: go-cache
+on:
+  push:
+jobs:
+  runs-on: ubuntu-latest
+  steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup Go
+      uses: actions/setuop-go@v2
+      with:
+        go-version: 1.14
+
+    - name: Check gofmt
+      run: test -z "$(gofmt -s -d .)"
+
+    - name: Run go vet
+      run: go vet ./...
+
+    - name: Test
+      run: go test -v

cache.go

@@ -1117,7 +1117,7 @@ func (c *cache) Flush() map[string]*Item {
 
 	c.items = map[string]*Item{}
 
-	return m
+	return nil
 }
 
 type janitor struct {