Fix stftime.

1 files changed, 2 insertions, 0 deletions

diff --git a/builtin.c b/builtin.c
index 072fd8ff..bae02f4d 100644
--- a/builtin.c
+++ b/builtin.c
@@ -1673,6 +1673,8 @@ do_strftime(int nargs)
 			if (do_lint && (t2->flags & (NUMCUR|NUMBER)) == 0)
 				lintwarn(_("strftime: received non-numeric second argument"));
 			fclock = (time_t) force_number(t2);
+			if (fclock < 0)
+				fatal(_("strftime: second argument less than 0 or too big for time_t"));
 			DEREF(t2);
 		}