lib: Prevent using protocol method with native path (fixes #7557) (#7563)

lib/scanner/virtualfs_test.go

@@ -10,7 +10,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"os"
 	"path/filepath"
 	"strings"
 	"time"
@@ -43,7 +42,7 @@ func (i infiniteFS) DirNames(name string) ([]string, error) {
 	for j := 0; j < i.width; j++ {
 		names = append(names, fmt.Sprintf("aa-file-%d", j))
 	}
-	if len(strings.Split(name, string(os.PathSeparator))) < i.depth {
+	if len(fs.PathComponents(name)) < i.depth {
 		for j := 0; j < i.width; j++ {
 			names = append(names, fmt.Sprintf("zz-dir-%d", j))
 		}

lib/scanner/walk.go

@@ -311,7 +311,7 @@ func (w *walker) walkAndHashFiles(ctx context.Context, toHashChan chan<- protoco
 		// ignored path need to be handled as well.
 		// Prepend an empty string to handle ignoredParent without anything
 		// appended in the first iteration.
-		for _, name := range append([]string{""}, strings.Split(rel, string(fs.PathSeparator))...) {
+		for _, name := range append([]string{""}, fs.PathComponents(rel)...) {
 			ignoredParent = filepath.Join(ignoredParent, name)
 			info, err = w.Filesystem.Lstat(ignoredParent)
 			// An error here would be weird as we've already gotten to this point, but act on it nonetheless