Make "empty ident" error message a bit more helpful.

diff --git a/diffcore-rename.c b/diffcore-rename.c
index dba965c0b4006251b1da04465d319c5fe9997ea4..39d9126cb9d397df06d41495a3402123fa4ba46b 100644 (file)
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -282,7 +282,7 @@ void diffcore_rename(struct diff_options *options)
                else if (detect_rename == DIFF_DETECT_COPY)
                        register_rename_src(p->one, 1);
        }
-       if (rename_dst_nr == 0 ||
+       if (rename_dst_nr == 0 || rename_src_nr == 0 ||
            (0 < rename_limit && rename_limit < rename_dst_nr))
                goto cleanup; /* nothing to do */