onedrive: report any list errors during cleanup

.golangci.yml

@@ -44,20 +44,6 @@ issues:
       - staticcheck
       text: 'SA6002: argument should be pointer-like to avoid allocations'
 
-    # TODO: Investigate if this is a real issue. If not, i.e. it is a false
-    # positive, consider instead excluding this check using a code comment!
-    - path: ^backend[\\/]onedrive[\\/]onedrive\.go$
-      linters:
-      - staticcheck
-      text: 'SA4009: argument err is overwritten before first use'
-
-    # TODO: Investigate if this is a real issue. If not, i.e. it is a false
-    # positive, consider instead excluding this check using a code comment!
-    - path: ^backend[\\/]onedrive[\\/]onedrive\.go$
-      linters:
-      - staticcheck
-      text: 'SA4009\(related information\): assignment to err'
-
     # TODO: Investigate if this is a real issue. If not, i.e. it is a false
     # positive, consider instead excluding this check using a code comment!
     - path: ^fs[\\/]pacer\.go$

backend/onedrive/onedrive.go

@@ -1724,6 +1724,10 @@ func (f *Fs) CleanUp(ctx context.Context) error {
 	token := make(chan struct{}, f.ci.Checkers)
 	var wg sync.WaitGroup
 	err := walk.Walk(ctx, f, "", true, -1, func(path string, entries fs.DirEntries, err error) error {
+		if err != nil {
+			fs.Errorf(f, "Failed to list %q: %v", path, err)
+			return nil
+		}
 		err = entries.ForObjectError(func(obj fs.Object) error {
 			o, ok := obj.(*Object)
 			if !ok {