[Bug c++/58636] New: [4.7/4.8/4.9 Regression] ICE with initializer_list and rvalue references

[Bug c++/58636] New: [4.7/4.8/4.9 Regression] ICE with initializer_list and rvalue references

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

            Bug ID: 58636
           Summary: [4.7/4.8/4.9 Regression] ICE with initializer_list and
                    rvalue references
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following similar invalid code snippets (compiled with "-std=c++11")
trigger ICEs in different parts of the compiler:

========================================
#include <initializer_list>

int foo(std::initializer_list<int&&>);

int i = foo({ 0 });
========================================

bug.cc:5:18: error: 'const' qualifiers cannot be applied to 'int&&'
 int i = foo({ 0 });
                  ^
In file included from bug.cc:1:0:
.../include/c++/4.9.0/initializer_list: In instantiation of 'class
std::initializer_list<int&&>':
bug.cc:5:18:   required from here
.../include/c++/4.9.0/initializer_list:54:26: error: forming pointer to
reference type 'int&&'
       typedef const _E*  iterator;
                          ^
.../include/c++/4.9.0/initializer_list:55:26: error: forming pointer to
reference type 'int&&'
       typedef const _E*  const_iterator;
                          ^
bug.cc: In function 'void __static_initialization_and_destruction_0(int, int)':
bug.cc:5:18: internal compiler error: in gimplify_init_ctor_eval, at
gimplify.c:3734
 int i = foo({ 0 });
                  ^
0x96977d gimplify_init_ctor_eval
        ../../gcc/gcc/gimplify.c:3734
0x96fbd4 gimplify_init_constructor
        ../../gcc/gcc/gimplify.c:4133
0x970a7e gimplify_modify_expr_rhs
        ../../gcc/gcc/gimplify.c:4518
0x970de4 gimplify_modify_expr
        ../../gcc/gcc/gimplify.c:4834
0x9661d5 gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7332
0x9691a6 gimplify_stmt(tree_node**, gimple_statement_d**)
        ../../gcc/gcc/gimplify.c:5709
0x964130 gimplify_and_add
        ../../gcc/gcc/gimplify.c:329
0x964130 internal_get_tmp_var
        ../../gcc/gcc/gimplify.c:594
0x964bae gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:8163
0x96dec9 gimplify_call_expr
        ../../gcc/gcc/gimplify.c:2635
0x96567a gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7303
0x970f58 gimplify_modify_expr
        ../../gcc/gcc/gimplify.c:4875
0x9661d5 gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7332
0x9691a6 gimplify_stmt(tree_node**, gimple_statement_d**)
        ../../gcc/gcc/gimplify.c:5709
0x9656fe gimplify_cleanup_point_expr
        ../../gcc/gcc/gimplify.c:5485
0x9656fe gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7669
0x9691a6 gimplify_stmt(tree_node**, gimple_statement_d**)
        ../../gcc/gcc/gimplify.c:5709
0x964f9b gimplify_statement_list
        ../../gcc/gcc/gimplify.c:1525
0x964f9b gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7721
0x9691a6 gimplify_stmt(tree_node**, gimple_statement_d**)
        ../../gcc/gcc/gimplify.c:5709
Please submit a full bug report, [etc.]


===========================================
#include <initializer_list>

auto i = std::initializer_list<int&&>{ 0 };
===========================================

In file included from bug.cc:1:0:
.../include/c++/4.9.0/initializer_list: In instantiation of 'class
std::initializer_list<int&&>':
bug.cc:3:42:   required from here
.../include/c++/4.9.0/initializer_list:54:26: error: forming pointer to
reference type 'int&&'
       typedef const _E*  iterator;
                          ^
.../include/c++/4.9.0/initializer_list:55:26: error: forming pointer to
reference type 'int&&'
       typedef const _E*  const_iterator;
                          ^
bug.cc:3:42: error: 'const' qualifiers cannot be applied to 'int&&'
 auto i = std::initializer_list<int&&>{ 0 };
                                          ^
bug.cc:3:42: internal compiler error: in split_nonconstant_init_1, at
cp/typeck2.c:597
0x5dd883 split_nonconstant_init_1
        ../../gcc/gcc/cp/typeck2.c:597
0x5e0f12 split_nonconstant_init
        ../../gcc/gcc/cp/typeck2.c:692
0x5e0f12 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        ../../gcc/gcc/cp/typeck2.c:810
0x557478 check_initializer
        ../../gcc/gcc/cp/decl.c:5728
0x56a35c cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        ../../gcc/gcc/cp/decl.c:6347
0x651267 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16577
0x65198f cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:10995
0x653810 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:10876
0x65c83e cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:10773
0x65b5aa cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:10659
0x65ce76 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:3939
0x65ce76 c_parse_file()
        ../../gcc/gcc/cp/parser.c:28911
0x7708b3 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1046
Please submit a full bug report, [etc.]

[Bug c++/58636] [4.7/4.8/4.9 Regression] ICE with initializer_list and rvalue references

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P5
   Target Milestone|---                         |4.7.4

[Bug c++/58636] [4.7/4.8/4.9/4.10 Regression] ICE with initializer_list and rvalue references

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.4                       |4.8.4

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The 4.7 branch is being closed, moving target milestone to 4.8.4.

[Bug c++/58636] [4.8/4.9/4.10 Regression] ICE with initializer_list and rvalue references

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-07-13
                 CC|                            |jason at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org
     Ever confirmed|0                           |1

[Bug c++/58636] [4.8/4.9/4.10 Regression] ICE with initializer_list and rvalue references

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jul 14 05:25:13 2014
New Revision: 212503

URL: https://gcc.gnu.org/viewcvs?rev=212503&root=gcc&view=rev
Log:
    PR c++/58636
    * call.c (build_list_conv): Don't try to build a list of references.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/initlist-array4.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c

[Bug c++/58636] [4.8/4.9/4.10 Regression] ICE with initializer_list and rvalue references

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jul 14 05:28:21 2014
New Revision: 212508

URL: https://gcc.gnu.org/viewcvs?rev=212508&root=gcc&view=rev
Log:
    PR c++/58636
    * call.c (build_list_conv): Don't try to build a list of references.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/cpp0x/initlist-array4.C
Modified:
    branches/gcc-4_9-branch/gcc/cp/ChangeLog
    branches/gcc-4_9-branch/gcc/cp/call.c

[Bug c++/58636] [4.8/4.9/4.10 Regression] ICE with initializer_list and rvalue references

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58636

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|4.8.4                       |4.9.1

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 4.9.1.