t0051: test GIT_TRACE to a windows named pipe

diff --git a/submodule.c b/submodule.c
index edc3a206d7cb3b23c7779ddd48595df6b927c2f2..939d6870ecd7cfbc62f9fa3fb867e5c7362ed9bd 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1169,8 +1169,10 @@ int submodule_touches_in_range(struct object_id *excl_oid,
 
        argv_array_push(&args, "--"); /* args[0] program name */
        argv_array_push(&args, oid_to_hex(incl_oid));
-       argv_array_push(&args, "--not");
-       argv_array_push(&args, oid_to_hex(excl_oid));
+       if (!is_null_oid(excl_oid)) {
+               argv_array_push(&args, "--not");
+               argv_array_push(&args, oid_to_hex(excl_oid));
+       }
 
        collect_changed_submodules(&subs, &args);
        ret = subs.nr;