AK: Fix 64-bit alignment issue in shared-superstring substrings

Thanks to Timothy Flynn for the test! Fixes #17141
Author: https://github.com/awesomekling Commit: d0697d350d Pull-request: https://github.com/SerenityOS/serenity/pull/17520 Issue: https://github.com/SerenityOS/serenity/issues/17141 Reviewed-by: https://github.com/trflynn89 ✅
2025-08-08 01:00:05 +00:00 · 2023-02-18 13:43:52 +01:00 · 2023-02-18 13:43:52 +01:00 · d0697d350d · 2024-07-18 01:43:16 +09:00
commit d0697d350d
parent ba5df46a49
2 changed files with 12 additions and 1 deletions
--- a/AK/String.cpp
+++ b/AK/String.cpp
@ -77,7 +77,7 @@ private:
    bool m_substring { false };
    bool m_is_fly_string { false };

-    u8 m_bytes_or_substring_data[0];
+    alignas(SubstringData) u8 m_bytes_or_substring_data[0];
 };

 void StringData::operator delete(void* ptr)