From 68467da17d576a17e4ff96c60f581561ac0bbe88 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Fri, 2 Feb 2024 13:22:25 -0500
Subject: check for invalid integer conversions

---
 src/inttypes/imaxdiv.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/inttypes/imaxdiv.c')

diff --git a/src/inttypes/imaxdiv.c b/src/inttypes/imaxdiv.c
index 7600cfab..c007f762 100644
--- a/src/inttypes/imaxdiv.c
+++ b/src/inttypes/imaxdiv.c
@@ -7,6 +7,10 @@ imaxdiv_t imaxdiv(intmax_t numer, intmax_t denom)
 {
 	SIGNAL_SAFE(0);
 
+	if ((denom == 0) || (numer == INTMAX_MIN && denom == -1)) {
+		UNDEFINED("In call to imaxdiv(): The result of %jd / %jd is not representable as an intmax_t", numer, denom);
+	}
+
 	imaxdiv_t r;
 	r.quot = numer / denom;
 	r.rem = numer % denom;
-- 
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