difftool: Handle compare() returning -1

diff --git a/submodule.c b/submodule.c
index 784b58039dd078fc1e0c4554820cd0e99c8e41d2..959d349ea7426344289020ee4216785fa65ec1e6 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -63,6 +63,9 @@ static int add_submodule_odb(const char *path)
        alt_odb->name[40] = '\0';
        alt_odb->name[41] = '\0';
        alt_odb_list = alt_odb;
+
+       /* add possible alternates from the submodule */
+       read_info_alternates(objects_directory.buf, 0);
        prepare_alt_odb();
 done:
        strbuf_release(&objects_directory);