[Bug c++/59066] [C++11] 'using' instead of 'typedef' causes a segmentation fault.

["reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59066

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-02-14
                 CC|                            |reichelt at gcc dot gnu.org
            Summary|C++11, 'using' instead of   |[C++11] 'using' instead of
                   |'typedef' causes a          |'typedef' causes a
                   |segmentation fault.         |segmentation fault.
     Ever confirmed|0                           |1
      Known to fail|                            |4.7.0, 4.8.0, 4.9.0

--- Comment #4 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Confirmed. Reduced testcase that crashes since GCC 4.7.0 when template
alias (aka 'using') was introduced:

============================================================================
template<typename T, template <typename> class U> void foo(const U<T>&) {}

template<typename> struct A
{
  using B = A;
  B bar();
};

void baz()
{
  foo(A<int>().bar());
}
============================================================================

Stack trace with current 4.8 branch:

bug.cc: In function 'void baz()':
bug.cc:11:22: internal compiler error: Segmentation fault
   foo(A<int>().bar());
                      ^
0xad469f crash_signal
        ../../gcc/gcc/toplev.c:332
0xcff5e2 tree_check
        ../../gcc/gcc/tree.h:3683
0xcff5e2 make_decl_rtl(tree_node*)
        ../../gcc/gcc/varasm.c:1197
0x7d72f3 rtx_for_function_call
        ../../gcc/gcc/calls.c:1675
0x7d72f3 expand_call(tree_node*, rtx_def*, int)
        ../../gcc/gcc/calls.c:2983
0x8aadcd expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**)
        ../../gcc/gcc/expr.c:10263
0x7e82fd expand_call_stmt
        ../../gcc/gcc/cfgexpand.c:2114
0x7e82fd expand_gimple_stmt_1
        ../../gcc/gcc/cfgexpand.c:2152
0x7e82fd expand_gimple_stmt
        ../../gcc/gcc/cfgexpand.c:2304
0x7e9162 expand_gimple_basic_block
        ../../gcc/gcc/cfgexpand.c:4138
0x7eacdc gimple_expand_cfg
        ../../gcc/gcc/cfgexpand.c:4657
Please submit a full bug report, [etc.]


Stack trace with trunk:

cc1plus: internal compiler error: Segmentation fault
0xba523f crash_signal
        ../../gcc/gcc/toplev.c:337
0x87e004 tree_check
        ../../gcc/gcc/tree.h:2918
0x87e004 decl_assembler_name_hash
        ../../gcc/gcc/symtab.c:98
0x87e46f insert_to_assembler_name_hash
        ../../gcc/gcc/symtab.c:209
0x87e5c1 symtab_initialize_asm_name_hash
        ../../gcc/gcc/symtab.c:432
0x88cda2 analyze_functions
        ../../gcc/gcc/cgraphunit.c:1124
0x88e2a5 finalize_compilation_unit()
        ../../gcc/gcc/cgraphunit.c:2320
0x689cae cp_write_global_declarations()
        ../../gcc/gcc/cp/decl2.c:4448
Please submit a full bug report, [etc.]