Fix Git revision navigation in currently removed directories

* lisp/vc/vc-git.el (vc-git-next-revision): Use the repo root as
default-directory because FILE's parent directory might not exist
anymore (bug#26345).

diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el
index 1a3f1bf2f48ef8588324a95424c9a8e55865a07b..4767cbf88c62a4b546498d8fbcb5dc094f81dfd1 100644 (file)
--- a/lisp/vc/vc-git.el
+++ b/lisp/vc/vc-git.el
@@ -1274,9 +1274,8 @@ This requires git 1.8.4 or later, for the \"-L\" option of \"git log\"."
 
 (defun vc-git-next-revision (file rev)
   "Git-specific version of `vc-next-revision'."
-  (let* ((default-directory (file-name-directory
-                            (expand-file-name file)))
-         (file (file-name-nondirectory file))
+  (let* ((default-directory (vc-git-root file))
+         (file (file-relative-name file))
          (current-rev
           (with-temp-buffer
             (and