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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60253] New: [4.7/4.8/4.9 Regression] ICE passing class object through ellipsis (...)
Date: Mon, 17 Feb 2014 21:52:00 -0000
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X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 4.9.0
X-Bugzilla-Keywords: error-recovery, ice-on-invalid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: reichelt at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60253

            Bug ID: 60253
           Summary: [4.7/4.8/4.9 Regression] ICE passing class object
                    through ellipsis (...)
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: error-recovery, ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following invalid code snippet triggers an ICE since GCC 4.7.0:

====================================
struct A
{
  ~A();
};

struct B
{
  B(...);
};

B b(0, A());
====================================

bug.cc:11:11: error: cannot pass objects of non-trivially-copyable type 'struct
A' through '...'
 B b(0, A());
           ^
bug.cc: In function 'void __static_initialization_and_destruction_0(int, int)':
bug.cc:11:3: internal compiler error: in create_tmp_var, at gimple-expr.c:506
 B b(0, A());
   ^
0x9d4fa3 create_tmp_var(tree_node*, char const*)
        ../../gcc/gcc/gimple-expr.c:506
0x9fe66c create_tmp_from_val
        ../../gcc/gcc/gimplify.c:457
0x9fe66c lookup_tmp_var
        ../../gcc/gcc/gimplify.c:479
0x9fe66c internal_get_tmp_var
        ../../gcc/gcc/gimplify.c:523
0x9f7261 gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:8346
0xa02038 gimplify_call_expr
        ../../gcc/gcc/gimplify.c:2375
0x9f76b7 gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7419
0x9fc086 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gcc/gimplify.c:5341
0x9f7742 gimplify_cleanup_point_expr
        ../../gcc/gcc/gimplify.c:5117
0x9f7742 gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7811
0x9fc086 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gcc/gimplify.c:5341
0x9f81ab gimplify_statement_list
        ../../gcc/gcc/gimplify.c:1412
0x9f81ab gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7863
0x9fc086 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gcc/gimplify.c:5341
0xa00571 gimplify_cond_expr
        ../../gcc/gcc/gimplify.c:3066
0x9f7c1c gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7404
0x9fc086 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gcc/gimplify.c:5341
0xa00571 gimplify_cond_expr
        ../../gcc/gcc/gimplify.c:3066
0x9f7c1c gimplify_expr(tree_node**, gimple_statement_base**,
gimple_statement_base**, bool (*)(tree_node*), int)
        ../../gcc/gcc/gimplify.c:7404
0x9fc086 gimplify_stmt(tree_node**, gimple_statement_base**)
        ../../gcc/gcc/gimplify.c:5341
Please submit a full bug report, [etc.]