[Bug c++/83231] ICE on constexpr evaluation

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83231

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-12-01
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |4.8.3, 4.9.3, 5.3.0, 6.2.0,
                   |                            |7.1.0, 8.0

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.  The ICE seems to go as far back as the introduction of the
-std=c++1y option in GCC 4.8.0 (r185596) so it doesn't look like a regression.

The full output and stack trace with the top of trunk (8.0) is below:

t.C: In function ‘void guid_tests()’:
t.C:15:34:   in ‘constexpr’ expansion of ‘is_equal(some_guid, some_guid)’
t.C:15:55: internal compiler error: in cxx_eval_bit_field_ref, at
cp/constexpr.c:2608
     constexpr bool val = is_equal(some_guid, some_guid);
                                                       ^
0x82927e cxx_eval_bit_field_ref
        /ssd/src/gcc/git/gcc/cp/constexpr.c:2608
0x8313ca cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4422
0x830bd7 cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4235
0x8269cc cxx_eval_binary_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:2001
0x8311f8 cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4379
0x8293c5 cxx_eval_logical_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:2634
0x831254 cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4387
0x82e349 cxx_eval_store_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:3640
0x830962 cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4196
0x830a66 cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4208
0x825554 cxx_eval_call_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:1688
0x8300ce cxx_eval_constant_expression
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4118
0x832c09 cxx_eval_outermost_constant_expr
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4756
0x8333d2 cxx_constant_value(tree_node*, tree_node*)
        /ssd/src/gcc/git/gcc/cp/constexpr.c:4864
0xae9926 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        /ssd/src/gcc/git/gcc/cp/typeck2.c:827
0x88e79e check_initializer
        /ssd/src/gcc/git/gcc/cp/decl.c:6352
0x892075 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        /ssd/src/gcc/git/gcc/cp/decl.c:7024
0x99212c cp_parser_init_declarator
        /ssd/src/gcc/git/gcc/cp/parser.c:19589
0x98550e cp_parser_simple_declaration
        /ssd/src/gcc/git/gcc/cp/parser.c:12938
0x985072 cp_parser_block_declaration
        /ssd/src/gcc/git/gcc/cp/parser.c:12756
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