reproduce #371

Signed-off-by: Pierre Fenoll <[email protected]>

.github/workflows/go.yml

@@ -65,6 +65,7 @@ jobs:
       run: git --no-pager diff && [[ $(git --no-pager diff --name-only | wc -l) = 0 ]]
 
     - run: go test ./...
+    - run: go test -v -run TestRaceyPatternSchema -race ./...
     - run: |
         cd openapi3/testdata
         go get -u -v github.com/getkin/kin-openapi

openapi3/race_test.go

@@ -0,0 +1,26 @@
+package openapi3_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/getkin/kin-openapi/openapi3"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRaceyPatternSchema(t *testing.T) {
+	schema := openapi3.Schema{
+		Pattern: "^test|for|race|condition$",
+	}
+
+	err := schema.Validate(context.Background())
+	require.NoError(t, err)
+
+	visit := func() {
+		err := schema.VisitJSONString("test")
+		require.NoError(t, err)
+	}
+
+	go visit()
+	visit()
+}