From 549fcb6bb8797a5fe981d484b84ffca23226655e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
Date: Sat, 30 Apr 2022 14:51:10 +0200
Subject: [PATCH] Always abort on overflow in String_cat

Not only in debug mode.
---
 XUtils.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/XUtils.c b/XUtils.c
index b34a8a73..2012b6c6 100644
--- a/XUtils.c
+++ b/XUtils.c
@@ -115,7 +115,9 @@ inline bool String_contains_i(const char* s1, const char* s2, bool multi) {
 char* String_cat(const char* s1, const char* s2) {
    const size_t l1 = strlen(s1);
    const size_t l2 = strlen(s2);
-   assert(SIZE_MAX - l1 > l2);
+   if (SIZE_MAX - l1 <= l2) {
+      fail();
+   }
    char* out = xMalloc(l1 + l2 + 1);
    memcpy(out, s1, l1);
    memcpy(out + l1, s2, l2);