https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108936
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
template<bool BigEndianData = true>
struct Endianness
{
static constexpr bool BigEndianHost = (union{short s;char c;}){1}.c != 1;
};
int main()
{
Endianness<>::BigEndianHost;
}
$ ./cc1plus -quiet bz.C
bz.C: In instantiation of ‘constexpr const bool Endianness<>::BigEndianHost’:
bz.C:9:17: required from here
bz.C:4:69: internal compiler error: in type_has_nontrivial_copy_init, at
cp/tree.cc:4631
4 | static constexpr bool BigEndianHost = (union{short s;char c;}){1}.c
!= 1;
| ~~~~^
0x1058fa5 type_has_nontrivial_copy_init(tree_node const*)
/home/mpolacek/src/gcc/gcc/cp/tree.cc:4631
0x1047c78 build_target_expr_with_type(tree_node*, tree_node*, int)
/home/mpolacek/src/gcc/gcc/cp/tree.cc:904
0x1047e65 get_target_expr(tree_node*, int)
/home/mpolacek/src/gcc/gcc/cp/tree.cc:948
0x10112be finish_compound_literal(tree_node*, tree_node*, int, fcl_t)
/home/mpolacek/src/gcc/gcc/cp/semantics.cc:3356
0xfbfd62 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*)
/home/mpolacek/src/gcc/gcc/cp/pt.cc:21515
0xfb763b tsubst_non_call_postfix_expression
/home/mpolacek/src/gcc/gcc/cp/pt.cc:19866
0xfbe98a tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*)
/home/mpolacek/src/gcc/gcc/cp/pt.cc:21314
0xfbab12 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*)
/home/mpolacek/src/gcc/gcc/cp/pt.cc:20576
0xfb7019 tsubst_expr(tree_node*, tree_node*, int, tree_node*)
/home/mpolacek/src/gcc/gcc/cp/pt.cc:19775
0xfa50de tsubst_init
/home/mpolacek/src/gcc/gcc/cp/pt.cc:17014
0xfd413b regenerate_decl_from_template
/home/mpolacek/src/gcc/gcc/cp/pt.cc:26334
0xfd62e8 instantiate_body
/home/mpolacek/src/gcc/gcc/cp/pt.cc:26651
0xfd8412 instantiate_decl(tree_node*, bool, bool)
/home/mpolacek/src/gcc/gcc/cp/pt.cc:27006
0xdc8886 mark_used(tree_node*, int)
/home/mpolacek/src/gcc/gcc/cp/decl2.cc:5840
0x1016792 finish_id_expression_1
/home/mpolacek/src/gcc/gcc/cp/semantics.cc:4252
0x1017079 finish_id_expression(tree_node*, tree_node*, tree_node*, cp_id_kind*,
bool, bool, bool*, bool, bool, bool, bool, char const**, unsigned int)
/home/mpolacek/src/gcc/gcc/cp/semantics.cc:4398
0xed94b6 cp_parser_primary_expression
/home/mpolacek/src/gcc/gcc/cp/parser.cc:6149
0xedd48c cp_parser_postfix_expression
/home/mpolacek/src/gcc/gcc/cp/parser.cc:7777
0xee0e91 cp_parser_unary_expression
/home/mpolacek/src/gcc/gcc/cp/parser.cc:9138
0xee243b cp_parser_cast_expression
/home/mpolacek/src/gcc/gcc/cp/parser.cc:10044
