additional opening in shared_delete mode

flatfs.go

@@ -728,7 +728,7 @@ func (fs *Datastore) Query(q query.Query) (query.Results, error) {
 }
 
 func (fs *Datastore) walkTopLevel(path string, result *query.ResultBuilder) error {
-	dir, err := os.Open(path)
+	dir, err := open(path)
 	if err != nil {
 		return err
 	}
@@ -1054,7 +1054,7 @@ func (fs *Datastore) tempFile() (*os.File, error) {
 }
 
 func (fs *Datastore) walk(path string, qrb *query.ResultBuilder) error {
-	dir, err := os.Open(path)
+	dir, err := open(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			// not an error if the file disappeared

util_unix.go

@@ -7,10 +7,14 @@ import (
 	"os"
 )
 
-func tempFile(dir, pattern string) (f *os.File, err error) {
+func tempFile(dir, pattern string) (*os.File, error) {
 	return ioutil.TempFile(dir, pattern)
 }
 
 func readFile(filename string) ([]byte, error) {
 	return ioutil.ReadFile(filename)
 }
+
+func open(name string) (*os.File, error) {
+	return os.Open(name)
+}

util_windows.go

@@ -91,3 +91,7 @@ func readFile(filename string) ([]byte, error) {
 
 	return ioutil.ReadAll(f)
 }
+
+func open(name string) (*os.File, error) {
+	return goissue34681.Open(name)
+}