re PR c++/85070 (ICE on C++ code: in lazily_declare_fn, at cp/method.c:2409)

/cp
2018-09-24  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/85070
	* method.c (lazily_declare_fn): During error-recovery add_method
	may return false.

/testsuite
2018-09-24  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/85070
	* g++.dg/cpp0x/pr85070.C: New.

From-SVN: r264541

gcc/cp/ChangeLog

+2018-09-24  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/85070
+	* method.c (lazily_declare_fn): During error-recovery add_method
+	may return false.
+
 2018-09-21  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/87372 - __func__ constexpr evaluation.

gcc/cp/method.c

@@ -2421,7 +2421,7 @@ lazily_declare_fn (special_function_kind sfk, tree type)
 
   /* Add it to the class  */
   bool added = add_method (type, fn, false);
-  gcc_assert (added);
+  gcc_assert (added || errorcount);
 
   /* Add it to TYPE_FIELDS.  */
   if (sfk == sfk_destructor

gcc/testsuite/ChangeLog

+2018-09-24  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/85070
+	* g++.dg/cpp0x/pr85070.C: New.
+
 2018-09-24  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/82699

gcc/testsuite/g++.dg/cpp0x/pr85070.C

+// { dg-do compile { target c++11 } }
+
+struct A;
+
+struct B
+{
+  constexpr A & operator= (const A &);  // { dg-warning "used" "" { target c++14_only } }
+};
+
+struct A : B  // { dg-error "cannot be overloaded" "" { target c++14_only } }
+{
+  using B::operator=;
+} a { a = a };