lib: Wrap errors with errors.Wrap instead of fmt.Errorf (#6181)

lib/model/model.go

@@ -10,7 +10,6 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net"
 	"path/filepath"
@@ -21,6 +20,9 @@ import (
 	stdsync "sync"
 	"time"
 
+	"github.com/pkg/errors"
+	"github.com/thejerf/suture"
+
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/connections"
 	"github.com/syncthing/syncthing/lib/db"
@@ -35,7 +37,6 @@ import (
 	"github.com/syncthing/syncthing/lib/upgrade"
 	"github.com/syncthing/syncthing/lib/util"
 	"github.com/syncthing/syncthing/lib/versioner"
-	"github.com/thejerf/suture"
 )
 
 // How many files to send in each Index/IndexUpdate message.
@@ -1799,7 +1800,7 @@ func (m *model) SetIgnores(folder string, content []string) error {
 	err := cfg.CheckPath()
 	if err == config.ErrPathMissing {
 		if err = cfg.CreateRoot(); err != nil {
-			return fmt.Errorf("failed to create folder root: %v", err)
+			return errors.Wrap(err, "failed to create folder root")
 		}
 		err = cfg.CheckPath()
 	}