[Bug c++/125851] Many C++ test failures with -std=c++29 (ICE in get_cxx_dialect_name, at cp/name-lookup.cc:7543) by r17-1595-g0c5c6249a2e9a7

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125851

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-06-17
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
This works for me:

diff --git a/gcc/cp/name-lookup.cc b/gcc/cp/name-lookup.cc
index e12e37c3515..60a6e6f4430 100644
--- a/gcc/cp/name-lookup.cc
+++ b/gcc/cp/name-lookup.cc
@@ -7555,6 +7555,8 @@ get_cxx_dialect_name (enum cxx_dialect dialect)
       return "C++23";
     case cxx26:
       return "C++26";
+    case cxx29:
+      return "C++29";
     }
 }