From: Marek Polacek <polacek@redhat.com>
Date: Mon, 13 Aug 2018 15:36:30 +0000 (+0000)
Subject: re PR c++/86915 (Segmentation fault for an array of auto in template parameter)
X-Git-Tag: basepoints/gcc-10~4789
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27a98312c54b6c00a4e7deb1bf663547cd4f2dcc;p=thirdparty%2Fgcc.git

re PR c++/86915 (Segmentation fault for an array of auto in template parameter)

	PR c++/86915
	* decl.c (create_array_type_for_decl): Handle null name.

	* g++.dg/diagnostic/auto1.C: New test.

From-SVN: r263507
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index fc0771aa7f2d..859085be4cad 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-13  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/86915
+	* decl.c (create_array_type_for_decl): Handle null name.
+
 2018-08-10  Jason Merrill  <jason@redhat.com>
 
 	PR c++/86728 - C variadic generic lambda.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 78ebbde61a33..b021ff6f37c5 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -9838,7 +9838,10 @@ create_array_type_for_decl (tree name, tree type, tree size)
      type-specifier, the program is ill-formed.  */
   if (type_uses_auto (type))
     {
-      error ("%qD declared as array of %qT", name, type);
+      if (name)
+   error ("%qD declared as array of %qT", name, type);
+      else
+   error ("creating array of %qT", type);
       return error_mark_node;
     }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 95d558f25220..c11b5c89af11 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-13  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/86915
+	* g++.dg/diagnostic/auto1.C: New test.
+
 2018-08-12  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/66679
diff --git a/gcc/testsuite/g++.dg/diagnostic/auto1.C b/gcc/testsuite/g++.dg/diagnostic/auto1.C
new file mode 100644
index 000000000000..ee2eefd59aa0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/diagnostic/auto1.C
@@ -0,0 +1,4 @@
+// PR c++/86915
+// { dg-do compile { target c++17 } }
+
+template<auto [1]> struct S; // { dg-error "creating array of .auto." }