diff --git a/clang/test/CXX/drs/dr2xx.cpp b/clang/test/CXX/drs/dr2xx.cpp
--- a/clang/test/CXX/drs/dr2xx.cpp
+++ b/clang/test/CXX/drs/dr2xx.cpp
@@ -3,6 +3,7 @@
 // RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++20 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++2b %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 
 // PR13819 -- __SIZE_TYPE__ is incompatible.
 typedef __SIZE_TYPE__ size_t; // expected-error 0-1 {{extension}}
@@ -692,6 +693,14 @@
   A<C>::type n; // expected-note {{instantiation of}}
 }
 
+namespace dr255 { // dr255: yes
+struct S {
+  void operator delete(void *){};
+  void operator delete(void *, int){};
+};
+void f(S *p) { delete p; }
+} // namespace dr255
+
 // dr256: dup 624
 
 namespace dr257 { // dr257: yes
diff --git a/clang/www/cxx_dr_status.html b/clang/www/cxx_dr_status.html
--- a/clang/www/cxx_dr_status.html
+++ b/clang/www/cxx_dr_status.html
@@ -1568,7 +1568,7 @@
     <td><a href="https://wg21.link/cwg255">255</a></td>
     <td>CD6</td>
     <td>Placement deallocation functions and lookup ambiguity</td>
-    <td class="none" align="center">Unknown</td>
+    <td class="full" align="center">Yes</td>
   </tr>
   <tr id="256">
     <td><a href="https://wg21.link/cwg256">256</a></td>