From fb331d39a659ecf6187a77ade01ca64a65c5980f Mon Sep 17 00:00:00 2001
From: notoria <notoria@users.noreply.github.com>
Date: Sun, 19 Apr 2020 22:43:13 +0200
Subject: [PATCH] Thrown an error if T < 0 or T > 0xfffffffffffffbff in
 sleep(T)

---
 src/prolog/lib/time.pl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/prolog/lib/time.pl b/src/prolog/lib/time.pl
index 42438c62..d4e27f2e 100644
--- a/src/prolog/lib/time.pl
+++ b/src/prolog/lib/time.pl
@@ -16,7 +16,12 @@
 
 sleep(T) :-
     builtins:must_be_number(T, sleep),
-    '$sleep'(T).
+    (   T < 0 ->
+        throw(domain_error(not_less_than_zero, T))
+    ;   T > 0xfffffffffffffbff ->
+        throw(domain_error(not_great_than_0xfffffffffffffbff, T))
+    ;   '$sleep'(T)
+    ).
 
 time(Goal) :-
         '$cpu_now'(T0),
-- 
2.54.0