[Bug c++/55323] New: [4.8] ICE in expand_aggr_init_1, at cp/init.c:1718

[Bug c++/55323] New: [4.8] ICE in expand_aggr_init_1, at cp/init.c:1718

[vincenzo.innocente at cern dot ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

             Bug #: 55323
           Summary: [4.8] ICE in expand_aggr_init_1, at cp/init.c:1718
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: vincenzo.innocente@cern.ch


there is a syntax error (correctly reported)
the ICE requires the instantiation in a() 

cat varcrash.cc 
#include<algorithm>
struct foo {
  foo(int a, float b);
};

struct bar : public foo {
  template<typename... Args>
  explicit bar(Args&& ... args) : 
    foo(2,std::forward<Args>(args)){}
};


void a() {
  bar b(2,1.);

}
pb-d-128-141-131-26:bugs48 innocent$ c++ -O2 -std=c++11 -c varcrash.cc 
varcrash.cc: In constructor ‘bar::bar(Args&& ...)’:
varcrash.cc:9:35: error: parameter packs not expanded with ‘...’:
     foo(2,std::forward<Args>(args)){}
                                   ^
varcrash.cc:9:35: note:         ‘args’
varcrash.cc:9:35: note:         ‘Args’
varcrash.cc: In instantiation of ‘bar::bar(Args&& ...) [with Args = {int,
double}]’:
varcrash.cc:14:13:   required from here
varcrash.cc:9:35: internal compiler error: in expand_aggr_init_1, at
cp/init.c:1718

varcrash.cc:9:35: internal compiler error: Abort trap: 6
c++: internal compiler error: Abort trap: 6 (program cc1plus)
Abort trap: 6
pb-d-128-141-131-26:bugs48 innocent$ c++ -v
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-apple-darwin12.2.0/4.8.0/lto-wrapper
Target: x86_64-apple-darwin12.2.0
Configured with: ./configure --enable-languages=c,c++,fortran
--disable-multilib --disable-bootstrap --enable-lto -disable-libitm
Thread model: posix
gcc version 4.8.0 20121109 (experimental) [trunk revision 193360] (GCC)

[Bug c++/55323] [4.8] ICE in expand_aggr_init_1, at cp/init.c:1718

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler at
                   |                            |googlemail dot com

--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-11-14 14:43:03 UTC ---
Reducing:

//----------------------
struct foo {
  foo(int a, float b);
};

struct bar : foo {
  template<typename... Args>
  bar(Args&&... args) : foo(2, args){}
};

bar b(2,1.);
//----------------------

gives me

"7|internal compiler error: in expand_aggr_init_1, at cp/init.c:1718|"

for gcc 4.8.0 20121104 (experimental)

using flags

-std=c++11 -pedantic -Wall

[Bug c++/55323] ICE in expand_aggr_init_1, at cp/init.c:1718

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-11-14
            Summary|[4.8] ICE in                |ICE in expand_aggr_init_1,
                   |expand_aggr_init_1, at      |at cp/init.c:1718
                   |cp/init.c:1718              |
     Ever Confirmed|0                           |1

[Bug c++/55323] ICE in expand_aggr_init_1, at cp/init.c:1718

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com
   Target Milestone|---                         |4.8.0

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-14 16:43:37 UTC ---
Thanks Daniel for the reduced testcase. The issue seems simple.

[Bug c++/55323] ICE in expand_aggr_init_1, at cp/init.c:1718

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-11-14 20:29:26 UTC ---
Author: paolo
Date: Wed Nov 14 20:29:07 2012
New Revision: 193505

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193505
Log:
/cp
2012-11-14  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/55323
    * init.c (emit_mem_initializers): Skip arguments == error_mark_node.

/testsuite
2012-11-14  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/55323
    * g++.dg/cpp0x/vt-55323.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/vt-55323.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/init.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/55323] ICE in expand_aggr_init_1, at cp/init.c:1718

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55323

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
         AssignedTo|paolo.carlini at oracle dot |unassigned at gcc dot
                   |com                         |gnu.org

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-14 20:37:16 UTC ---
Fixed for 4.8.0.