release notes

Author: emaxx-google

clang/docs/ReleaseNotes.rst

@@ -139,7 +139,7 @@ C++ Specific Potentially Breaking Changes
     // Fixed version:
     unsigned operator""_udl_name(unsigned long long);
 
-- Clang will now produce an error diagnostic when [[clang::lifetimebound]] is
+- Clang will now produce an error diagnostic when ``[[clang::lifetimebound]]`` is
   applied on a parameter or an implicit object parameter of a function that
   returns void. This was previously ignored and had no effect. (#GH107556)
 
@@ -148,6 +148,21 @@ C++ Specific Potentially Breaking Changes
     // Now diagnoses with an error.
     void f(int& i [[clang::lifetimebound]]);
 
+- Clang will now produce an error diagnostic when ``[[clang::lifetimebound]]``
+  is applied on a type (instead of a function parameter or an implicit object
+  parameter); this includes the case when the attribute is specified for an
+  unnamed function parameter. These were previously ignored and had no effect.
+  (#GH118281)
+
+  .. code-block:: c++
+
+    // Now diagnoses with an error.
+    int* [[clang::lifetimebound]] x;
+    // Now diagnoses with an error.
+    void f(int* [[clang::lifetimebound]] i);
+    // Now diagnoses with an error.
+    void g(int* [[clang::lifetimebound]]);
+
 - Clang now rejects all field accesses on null pointers in constant expressions. The following code
   used to work but will now be rejected: