From 0db6b7790da252c3558647c0239e95f5d24e9240 Mon Sep 17 00:00:00 2001
From: Janis <janis@nirgendwo.xyz>
Date: Sun, 19 Jan 2025 18:43:09 +0100
Subject: [PATCH] fix: UB in safe rust!

---
 crates/renderer/src/util.rs | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/crates/renderer/src/util.rs b/crates/renderer/src/util.rs
index 08d9982..7cafc4d 100644
--- a/crates/renderer/src/util.rs
+++ b/crates/renderer/src/util.rs
@@ -558,14 +558,19 @@ impl CStringList {
         let mut bytes = vec![];
         let mut strings = vec![];
         i.into_iter().for_each(|s| {
-            strings.push(bytes.as_ptr_range().end as *const i8);
+            let start = bytes.len();
             bytes.extend_from_slice(s.as_ref().as_bytes());
             bytes.push(0);
+            strings.push(start);
         });
 
+        let bytes = bytes.into_boxed_slice();
         Self {
-            strings: strings.into_boxed_slice(),
-            bytes: bytes.into_boxed_slice(),
+            strings: strings
+                .into_iter()
+                .map(|offset| unsafe { bytes.as_ptr().offset(offset as isize) as *const i8 })
+                .collect(),
+            bytes,
         }
     }
 }