This patch fixes an ICE with inherited default ctor and a local decl.
In such a case we don't have any conv args (just the object expression,
handled differently). Thus 'num_convs-1' is -1 and we seg fault at:
cand->convs[cand->num_convs-1]->ellipsis_p
do just check it's non-zero first.
committed to trunk
nathan
--
Nathan Sidwell
2017-01-18 Nathan Sidwell <nat...@acm.org>
PR c++/78488
* call.c (build_over_call): When checking ellipsis conversions for
an inherited ctor, make sure there is at least one conversion.
* g++.dg/cpp1z/inh-ctor37.C: New.
Index: cp/call.c
===================================================================
--- cp/call.c (revision 244586)
+++ cp/call.c (working copy)
@@ -7899,6 +7899,7 @@ build_over_call (struct z_candidate *can
could handle this by open-coding the inherited constructor rather than
defining it, but let's not bother now. */
if (!cp_unevaluated_operand
+ && cand->num_convs
&& cand->convs[cand->num_convs-1]->ellipsis_p)
{
if (complain & tf_error)
Index: testsuite/g++.dg/cpp1z/inh-ctor37.C
===================================================================
--- testsuite/g++.dg/cpp1z/inh-ctor37.C (revision 0)
+++ testsuite/g++.dg/cpp1z/inh-ctor37.C (working copy)
@@ -0,0 +1,13 @@
+// { dg-do compile { target c++11 } }
+// PR 78488, seg fault with inherited ctor
+
+struct Foo { Foo() {} };
+
+struct Bar : Foo {
+ using Foo::Foo;
+ Bar(void*);
+};
+
+int main() {
+ Bar f;
+}
