@@ -0,0 +1,85 @@
+// PR c++/87539
+// { dg-do compile { target c++11 } }
+// { dg-options "-Os" }
+
+namespace a {
+template <typename b, typename = b, typename = int> class c;
+class exception {};
+template <typename d> struct e { d f; };
+struct g { g(); g(const g &); };
+}
+template <class, class, class = int> class h;
+template <typename, typename> struct i;
+template <int j> struct aa { static const int k = j; };
+struct ac { typedef a::e<int> l; };
+struct ad;
+template <int, typename m, typename> struct ae { typedef m l; };
+template <typename m, typename n> struct ae<false, m, n> { typedef n l; };
+template <typename m, typename n, typename p> struct o {
+ typedef typename ae<m::k, n, p>::l l;
+};
+struct af { af(char *); };
+template <typename> struct ag { ag(a::g = a::g()) {} };
+template <typename ah, typename ai, typename aj, typename al>
+struct i<a::c<ah, ai, aj>, al> { typedef ag<al> l; };
+namespace ak {
+template <typename am, typename an, typename ao> struct ap {
+ typedef typename o<am, an, ao>::l ::l l;
+};
+template <typename = ad> struct aq { typedef ad l; };
+}
+template <typename ar> struct as {
+ typedef char at;
+ template <typename au, typename> static decltype(au(), at()) av(int);
+ template <typename, typename> static int av(...);
+ static const bool k = sizeof(av<ar, int>(0)) == 1;
+};
+template <typename ar> struct aw { static const bool k = as<ar>::k; };
+template <class ar> struct ax { typedef aw<ar> l; };
+template <typename ar> struct ay { typedef typename ax<ar>::l l; };
+template <typename ar> struct az : ay<ar>::l {};
+template <class ar, class> struct ba : aa<az<ar>::k> {};
+template <class> struct bb : ak::ap<ba<int, int>, ak::aq<>, int> {};
+template <typename> struct q : ba<bb<int>::l, int> {};
+template <class, class, bool> class r;
+template <class s, class t> struct r<s, t, false> {
+ s operator*();
+ s operator++();
+};
+template <class, class, class, class, class>
+class bc : public r<a::e<h<int, int>>, int, q<int>::k> {};
+template <class bd, class be, class bf, class u, class v, class bg, class w,
+ class x, class bh, class bi>
+int operator!=(bc<bd, be, bf, u, v>, bc<bg, w, x, bh, bi>);
+template <class, class, class> struct h {
+ typedef af bl;
+ bc<int, int, int, ak::ap<aa<false>, int, ac>::l, int> begin();
+ bc<int, int, int, ak::ap<aa<false>, int, ac>::l, int> end();
+ template <class bm> bm bn() const;
+ template <class> int bo() const;
+ template <class bm> int bx(const bl &, const bm &) const;
+ template <class> int bp(const bl &) const;
+};
+template <class bq, class br, class am>
+template <class bm>
+bm h<bq, br, am>::bn() const { typename i<a::c<int>, bm>::l(); return bm(); }
+template <class bq, class br, class am>
+template <class>
+int h<bq, br, am>::bo() const { i<a::c<int>, int>::l(); bn<int>(); return 0; }
+template <class bq, class br, class am>
+template <class bm>
+int h<bq, br, am>::bx(const bl &bs, const bm &) const { bp<int>(bs); return 0; }
+template <class bq, class br, class am>
+template <class>
+int h<bq, br, am>::bp(const bl &) const { bo<int>(); return 0; }
+char bt[] = "";
+void
+d()
+{
+ h<int, int> bu;
+ for (auto bv : bu)
+ try {
+ bv.f.bx(bt, 0);
+ } catch (a::exception) {
+ }
+}
Hi! The PR86687 fix fixed ICE on the following testcase on mingw. Because the PR was about fixing debug info, I think it is worth adding this testcase to the testsuite. The testcase is as far as creduce managed to reduce it after almost 18 hours. Tested on x86_64-linux and with a cross to x86_64-w64-mingw32, ok for trunk? ./cc1plus.263163 -quiet -Os pr87539.ii pr87539.ii:65:59: internal compiler error: in tsubst_default_argument, at cp/pt.c:12712 bm h<bq, br, am>::bn() const { typename i<a::c<int>, bm>::l(); return bm(); } ^~~ 0xa512db tsubst_default_argument(tree_node*, int, tree_node*, tree_node*, int) ../../gcc/cp/pt.c:12712 0x8429ec convert_default_arg(tree_node*, tree_node*, tree_node*, int, int) ../../gcc/cp/call.c:7372 ... 2018-11-28 Jakub Jelinek <jakub@redhat.com> PR c++/87539 * g++.dg/cpp0x/pr87539.C: New test. Jakub