[Bug c++/60108] New: ICE in use_thunk, at cp/method.c:340

[Bug c++/60108] New: ICE in use_thunk, at cp/method.c:340

[doko at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60108

            Bug ID: 60108
           Summary: ICE in use_thunk, at cp/method.c:340
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

seen with trunk and current 4.7 and 4.8 branches.

$ g++ -std=c++0x -c sample.cpp
sample.cpp:5:3: internal compiler error: in use_thunk, at cp/method.c:340
   ~B() = default;
   ^
Please submit a full bug report,
with preprocessed source if appropriate.


template <class> struct A {
  virtual ~A();
};
template <class... Ts> struct B : A<Ts>... {
  ~B() = default;
};
struct C : B<int, char> {
  C() {}
};

[Bug c++/60108] [4.7/4.8/4.9 Regression] [C++11] ICE in use_thunk, at cp/method.c:340

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60108

Volker Reichelt <reichelt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.4.0, 4.5.0, 4.6.0
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2014-02-14
                 CC|                            |reichelt at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|ICE in use_thunk, at        |[4.7/4.8/4.9 Regression]
                   |cp/method.c:340             |[C++11] ICE in use_thunk,
                   |                            |at cp/method.c:340
   Target Milestone|---                         |4.7.4
      Known to fail|                            |4.7.0

--- Comment #1 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Confirmed. ICEs since GCC 4.7.0.

Here's a testcase without variadic templates:

============================================
template<int> struct A
{
  virtual ~A();
};

template<typename> struct B : A<0>, A<1>
{
  ~B() = default;
};

struct C : B<bool>
{
  C() {}
};
============================================

[Bug c++/60108] [4.7/4.8/4.9 Regression] [C++11] ICE in use_thunk, at cp/method.c:340

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60108

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Feb 21 21:57:49 2014
New Revision: 208030

URL: http://gcc.gnu.org/viewcvs?rev=208030&root=gcc&view=rev
Log:
    PR c++/60108
    * semantics.c (expand_or_defer_fn_1): Check DECL_DEFAULTED_FN.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/defaulted48.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/semantics.c

[Bug c++/60108] [4.7/4.8/4.9 Regression] [C++11] ICE in use_thunk, at cp/method.c:340

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60108

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Feb 21 22:15:07 2014
New Revision: 208032

URL: http://gcc.gnu.org/viewcvs?rev=208032&root=gcc&view=rev
Log:
    PR c++/60108
    * semantics.c (expand_or_defer_fn_1): Check DECL_DEFAULTED_FN.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/defaulted48.C
Modified:
    branches/gcc-4_8-branch/gcc/cp/ChangeLog
    branches/gcc-4_8-branch/gcc/cp/semantics.c

[Bug c++/60108] [4.7/4.8/4.9 Regression] [C++11] ICE in use_thunk, at cp/method.c:340

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60108

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|4.7.4                       |4.8.3

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 4.8.3/4.9.  Not backporting C++11 fixes to 4.7.