[Bug c++/64520] New: [4.8/4.9/5 Regression] ICE with std::initializer_list

[Bug c++/64520] New: [4.8/4.9/5 Regression] ICE with std::initializer_list

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

            Bug ID: 64520
           Summary: [4.8/4.9/5 Regression] ICE with std::initializer_list
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
                CC: jason at gcc dot gnu.org

namespace std {
  template <class> class initializer_list;
}
struct A {
  template <typename... B> A(std::initializer_list<B...>);
};
A a { 0 };

ICEs with:
./cc1plus -quiet -std=c++0x rh1176446.ii
rh1176446.ii: In substitution of ‘template<class ... B>
A::A(std::initializer_list<B ...>) [with B = <missing>]’:
rh1176446.ii:7:9:   required from here
rh1176446.ii:7:9: internal compiler error: in unify, at cp/pt.c:18523
 A a { 0 };
         ^

starting with r179436.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/64521] New: [4.9/5 Regression] ICE with -frepo
Date: Wed, 07 Jan 2015 12:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd521

            Bug ID: 64521
           Summary: [4.9/5 Regression] ICE with -frepo
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
                CC: jason at gcc dot gnu.org

template <typename H> struct J { J(H); };
template <unsigned long, typename...> struct K;
template <unsigned long I> struct K<I> {};
template <unsigned long I, typename H, typename... T>
struct K<I, H, T...> : K<I + 1, T...>, J<H> {
  K(const H &p1, const T &... p2) : K<I + 1, T...>(p2...), J<H>(p1) {}
};
template <typename... E> struct C : K<0, E...> {
  C(const E &... p1) : K<0, E...>(p1...) {}
};
template <typename> struct A {
  A() = default;
};
struct M;
template <typename> struct L {
  struct B {
    template <typename> static M *__test(...);
    typedef A<int> _Del;
    typedef decltype(__test<_Del>()) type;
  };
  C<typename B::type, A<M>> _M_t;
  L(typename B::type) : _M_t(0, A<M>()) {}
};
struct M {};
void foo() { L<int>(new M); }

ICEs starting with r206182 with -frepo -std=c++11.  Doesn't ICE without -frepo
or with r206181 or earlier.

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.8.5

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

Ville Voutilainen <ville.voutilainen at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-01-07
                 CC|                            |ville.voutilainen at gmail dot com
     Ever confirmed|0                           |1

--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Clang rejects the code, so I'm for now marking this ice-on-invalid-code.

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jan 13 21:04:28 2015
New Revision: 219557

URL: https://gcc.gnu.org/viewcvs?rev=219557&root=gcc&view=rev
Log:
    PR c++/64520
    * pt.c (unify): Don't try to deduce to std::initializer_list<T...>.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/initlist91.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c

[Bug c++/64520] [4.8/4.9/5 Regression] ICE with std::initializer_list

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64520

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|4.8.5                       |5.0

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 5.