re PR c++/71966 (ICE on invalid C++11 code (undefined constructor used in a…

re PR c++/71966 (ICE on invalid C++11 code (undefined constructor used in a constant expression): in cp_build_addr_expr_1, at cp/typeck.c:5671)

2017-03-09  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/71966
	* g++.dg/cpp0x/pr71966-1.C: New.
	* g++.dg/cpp0x/pr71966-2.C: Likewise.

From-SVN: r246000

gcc/testsuite/ChangeLog

+2017-03-09  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/71966
+	* g++.dg/cpp0x/pr71966-1.C: New.
+	* g++.dg/cpp0x/pr71966-2.C: Likewise.
+
 2017-03-09  Martin Liska  <mliska@suse.cz>
 
 	PR tree-optimization/79631

gcc/testsuite/g++.dg/cpp0x/pr71966-1.C

+// PR c++/71966
+// { dg-do compile { target c++11 } }
+
+struct A
+{ 
+  constexpr A (int);  // { dg-message "never defined" }
+  constexpr operator int () const { return 0; }
+};
+
+template < int > struct B {};
+
+constexpr A a = 0;  // { dg-error "before its definition" }
+B < a > b;

gcc/testsuite/g++.dg/cpp0x/pr71966-2.C

+// PR c++/71966
+// { dg-do compile { target c++11 } }
+
+struct A
+{ 
+  constexpr A (int);  // { dg-message "never defined" }
+  constexpr operator int () const { return 0; }
+  int c;
+};
+
+template <int>
+struct B {};
+
+constexpr A a = 0;  // { dg-error "before its definition" }
+B<a> b;