https://bugzilla.redhat.com/show_bug.cgi?id=1922303
https://github.com/apache/subversion/commit/c83d9e5db564bdbbd91a7eb1c9399f66f481361c

--- a/subversion/libsvn_repos/config_file.c
+++ b/subversion/libsvn_repos/config_file.c
@@ -237,6 +237,10 @@ get_repos_config(svn_stream_t **stream,
     {
       /* Search for a repository in the full path. */
       repos_root_dirent = svn_repos_find_root_path(dirent, scratch_pool);
+      if (repos_root_dirent == NULL)
+        return svn_error_trace(handle_missing_file(stream, checksum, access,
+                                                   url, must_exist,
+                                                   svn_node_none));
 
       /* Attempt to open a repository at repos_root_dirent. */
       SVN_ERR(svn_repos_open3(&access->repos, repos_root_dirent, NULL,