re PR c++/83817 (internal compiler error: tree check: expected call_expr, have…

re PR c++/83817 (internal compiler error: tree check: expected call_expr, have aggr_init_expr in tsubst_copy_and_build, at cp/pt.c:17822)

	PR c++/83817
	* pt.c (tsubst_copy_and_build) <case CALL_EXPR>: If function
	is AGGR_INIT_EXPR rather than CALL_EXPR, set AGGR_INIT_FROM_THUNK_P
	instead of CALL_FROM_THUNK_P.

	* g++.dg/cpp1y/pr83817.C: New test.

From-SVN: r256726

gcc/cp/ChangeLog

 2018-01-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/83817
+	* pt.c (tsubst_copy_and_build) <case CALL_EXPR>: If function
+	is AGGR_INIT_EXPR rather than CALL_EXPR, set AGGR_INIT_FROM_THUNK_P
+	instead of CALL_FROM_THUNK_P.
+
 	PR c++/83825
 	* name-lookup.c (member_vec_dedup): Return early if len is 0.
 	(resort_type_member_vec, set_class_bindings,

gcc/cp/pt.c

@@ -17819,7 +17819,10 @@ tsubst_copy_and_build (tree t,
 		CALL_EXPR_REVERSE_ARGS (function) = rev;
 		if (thk)
 		  {
-		    CALL_FROM_THUNK_P (function) = true;
+		    if (TREE_CODE (function) == CALL_EXPR)
+		      CALL_FROM_THUNK_P (function) = true;
+		    else
+		      AGGR_INIT_FROM_THUNK_P (function) = true;
 		    /* The thunk location is not interesting.  */
 		    SET_EXPR_LOCATION (function, UNKNOWN_LOCATION);
 		  }

gcc/testsuite/ChangeLog

 2018-01-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/83817
+	* g++.dg/cpp1y/pr83817.C: New test.
+
 	PR c++/83825
 	* g++.dg/template/pr83825.C: New test.
 

gcc/testsuite/g++.dg/cpp1y/pr83817.C

+// PR c++/83817
+// { dg-do compile { target c++14 } }
+
+struct A;
+struct B { template <typename> using C = A; };
+struct D : B { struct F { typedef C<char> E; }; };
+struct G {
+  struct I { I (D, A &); } h;
+  D::F::E &k ();
+  D j;
+  G (G &&) : h (j, k ()) {}
+};
+struct N { G l; };
+typedef N (*M)(N &);
+struct H { const char *o; M s; };
+N foo (N &);
+H r { "", [](auto &x) { return foo (x); }};