Improve error message when source remote isn't found in sync #848

fs/operations.go

@@ -420,6 +420,9 @@ func readFilesMap(fs Fs, includeAll bool, dir string) (files map[string]Object,
 		normalised[normalisedRemote] = struct{}{}
 		return nil
 	})
+	if err != nil {
+		err = errors.Wrapf(err, "error listing: %s", fs)
+	}
 	return files, err
 }
 

fs/sync.go

@@ -5,6 +5,8 @@ package fs
 import (
 	"sync"
 	"time"
+
+	"github.com/pkg/errors"
 )
 
 type syncCopyMove struct {
@@ -103,6 +105,9 @@ func (s *syncCopyMove) readSrcUsingChan() {
 		return nil
 	})
 	close(s.srcFilesChan)
+	if err != nil {
+		err = errors.Wrapf(err, "error listing source: %s", s.fsrc)
+	}
 	s.srcFilesResult <- err
 }