From 6aa501d56d133fde03431350f6a99c1fb69e0080 Mon Sep 17 00:00:00 2001
From: user202729 <25191436+user202729@users.noreply.github.com>
Date: Thu, 23 Apr 2026 09:04:15 +0700
Subject: [PATCH] Add a test for null byte in format string

---
 test/compile-error-test/CMakeLists.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/compile-error-test/CMakeLists.txt b/test/compile-error-test/CMakeLists.txt
index 4725d333..5b57a2cf 100644
--- a/test/compile-error-test/CMakeLists.txt
+++ b/test/compile-error-test/CMakeLists.txt
@@ -239,6 +239,16 @@ if (CMAKE_CXX_STANDARD GREATER_EQUAL 20)
   #endif
     "
     ERROR)
+  expect_compile(
+    format-string-embedded-nul-error
+    "
+    #if FMT_USE_CONSTEVAL
+      fmt::format(\"a\\0{}\");
+    #else
+      #error
+    #endif
+    "
+    ERROR)
 
   # Compile-time argument name check
   expect_compile(