refs: ref entry with NULL sha1 is can be a dangling symref

diff --git a/builtin-config.c b/builtin-config.c
index d8da72cf20fa01600b4ad9e6e7a78240b4b4c290..a81bc8bbf033fac83ad6deecbf4a67ba44e06a0b 100644 (file)
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -390,6 +390,8 @@ int cmd_config(int argc, const char **argv, const char *unused_prefix)
        }
        else if (actions == ACTION_EDIT) {
                check_argc(argc, 0, 0);
+               if (!config_exclusive_filename && nongit)
+                       die("not in a git directory");
                git_config(git_default_config, NULL);
                launch_editor(config_exclusive_filename ?
                              config_exclusive_filename : git_path("config"),