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From: "qinzhao at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/101515] [11/12 Regression] ICE in
 pp_cxx_unqualified_id, at cp/cxx-pretty-print.c:128 since
 r11-6729-gadb520606ce3e1e1
Date: Mon, 07 Feb 2022 21:17:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101515

--- Comment #6 from qinzhao at gcc dot gnu.org ---
the following patch fixed this bug:
[opc@qinzhao-aarch64-ol8 latest_gcc]$ git diff
diff --git a/gcc/cp/cxx-pretty-print.cc b/gcc/cp/cxx-pretty-print.cc
index 4f9a090e520d..744ed0add5ba 100644
--- a/gcc/cp/cxx-pretty-print.cc
+++ b/gcc/cp/cxx-pretty-print.cc
@@ -171,7 +171,10 @@ pp_cxx_unqualified_id (cxx_pretty_printer *pp, tree t)
     case ENUMERAL_TYPE:
     case TYPENAME_TYPE:
     case UNBOUND_CLASS_TEMPLATE:
-      pp_cxx_unqualified_id (pp, TYPE_NAME (t));
+      if (TYPE_NAME (t))
+       pp_cxx_unqualified_id (pp, TYPE_NAME (t));
+      else
+       pp_string (pp, "<unnamed type>");
       if (tree ti =3D TYPE_TEMPLATE_INFO_MAYBE_ALIAS (t))
        if (PRIMARY_TEMPLATE_P (TI_TEMPLATE (ti)))
          {=