https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111075
--- Comment #1 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Preprocessed source:
% cat a-tail-padding1.ii
# 0 "/Users/fx/gcc-upstream/gcc/testsuite/g++.dg/torture/tail-padding1.C"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "/Users/fx/gcc-upstream/gcc/testsuite/g++.dg/torture/tail-padding1.C"
struct X { ~X() {} int n; char d; };
struct Y { Y(); char c[3]; };
struct Z : X, virtual Y { Z(); };
X f() { X nrvo; __builtin_memset(&nrvo, 0, sizeof(X)); return nrvo; }
Z::Z() : Y(), X(f()) {}
Y::Y() { c[0] = 1; }
int main() {
Z z;
if (z.c[0] != 1)
__builtin_abort ();
}
Backtrace of the ICE:
* frame #0: 0x0000000101b76378 cc1plus`internal_error(char const*, ...)
[inlined] auto_diagnostic_group::auto_diagnostic_group(this=<unavailable>) at
diagnostic.cc:2320:14
frame #1: 0x0000000101b76378 cc1plus`internal_error(gmsgid="in %s, at
%s:%d")
frame #2: 0x0000000101f92296
cc1plus`fancy_abort(file="/Users/fx/gcc-upstream/gcc/cp/constexpr.cc",
line=2918, function="cxx_eval_call_expression") at diagnostic.cc:2311:18
frame #3: 0x0000000101c8254e
cc1plus`::__second_sect_of_cxx_eval_call_expression() at constexpr.cc:2918:3
frame #4: 0x0000000100054f3b
cc1plus`::cxx_eval_constant_expression(ctx=0x00007ff7bfefe500, t=<unavailable>,
lval=vc_prvalue, non_constant_p=0x00007ff7bfefe4ee,
overflow_p=0x00007ff7bfefe4ef, jump_target=0x0000000000000000) at
constexpr.cc:7257:36
frame #5: 0x0000000100060156
cc1plus`::cxx_eval_outermost_constant_expr(t=0x00000001045b9880,
allow_non_constant=true, strict=<unavailable>, manifestly_const_eval=mce_false,
constexpr_dtor=false, object=0x0000000000000000) at constexpr.cc:8500:36
frame #6: 0x000000010006601c cc1plus`maybe_constant_value(t=<unavailable>,
decl=0x0000000000000000, manifestly_const_eval=mce_false) at
constexpr.cc:8788:45
frame #7: 0x0000000100091cf1 cc1plus`::cp_fold(x=<unavailable>,
flags=<unavailable>) at cp-gimplify.cc:3052:31
frame #8: 0x0000000100091f46 cc1plus`::cp_fold_r(stmt_p=0x00000001045a3ca0,
walk_subtrees=0x00007ff7bfefe8dc, data_=0x00007ff7bfefe9a0) at
cp-gimplify.cc:1077:28
frame #9: 0x0000000101952268 cc1plus`walk_tree_1(tp=<unavailable>,
func=<unavailable>, data=0x00007ff7bfefe9a0, pset=<unavailable>,
lh=(cc1plus`cp_walk_subtrees(tree_node**, int*, tree_node* (*)(tree_node**,
int*, void*), void*, hash_set<tree_node*, false,
default_hash_traits<tree_node*> >*) at tree.cc:5453:1))(tree_node**, int*,
void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) at
tree.cc:11398:25
frame #10: 0x0000000101952f0a cc1plus`walk_tree_1(tp=<unavailable>,
func=<unavailable>, data=0x00007ff7bfefe9a0, pset=<unavailable>,
lh=(cc1plus`cp_walk_subtrees(tree_node**, int*, tree_node* (*)(tree_node**,
int*, void*), void*, hash_set<tree_node*, false,
default_hash_traits<tree_node*> >*) at tree.cc:5453:1))(tree_node**, int*,
void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) at
tree.cc:11514:4
frame #11: 0x0000000100087c18
cc1plus`cp_fold_function(fndecl=0x00000001045be000) at cp-gimplify.cc:1199:3
frame #12: 0x00000001000dc0b9
cc1plus`finish_function(inline_p=<unavailable>) at decl.cc:18345:22
frame #13: 0x00000001001938bf
cc1plus`::maybe_thunk_body(fn=0x00000001045b4e00, force=<unavailable>) at
optimize.cc:445:26
frame #14: 0x000000010019443a
cc1plus`maybe_clone_body(fn=0x00000001045b4e00) at optimize.cc:557:38
frame #15: 0x0000000100278978
cc1plus`expand_or_defer_fn_1(fn=0x00000001045b4e00) at semantics.cc:4901:24
frame #16: 0x0000000100278c5e
cc1plus`expand_or_defer_fn(fn=0x00000001045b4e00) at semantics.cc:4932:28
frame #17: 0x000000010013c6d8
cc1plus`synthesize_method(fndecl=<unavailable>) at method.cc:1842:24
frame #18: 0x00000001000ee7c2 cc1plus`mark_used(decl=0x00000001045be000,
complain=<unavailable>) at decl2.cc:5855:25
frame #19: 0x000000010002016b cc1plus`::build_over_call(cand=<unavailable>,
flags=<unavailable>, complain=3) at call.cc:10403:21
frame #20: 0x000000010001d900
cc1plus`build_new_method_call(instance=0x00000001044305d0,
fns=0x0000000104591f20, args=<unavailable>, conversion_path=<unavailable>,
flags=1, fn_p=0x0000000000000000, complain=3) at call.cc:11710:31
frame #21: 0x000000010001eac0
cc1plus`build_special_member_call(instance=<unavailable>,
name=0x0000000104422100, args=0x00007ff7bfeff110, binfo=<unavailable>, flags=1,
complain=3) at call.cc:11190:31
frame #22: 0x000000010010fc1d cc1plus`::expand_aggr_init_1(tree, tree,
tree, tree, int, tsubst_flags_t) at init.cc:2203:40
frame #23: 0x000000010010fb34
cc1plus`::expand_aggr_init_1(binfo=0x00000001045b02a0,
true_exp=0x0000000000000000, exp=0x00000001044305d0, init=<unavailable>,
flags=1, complain=3)
frame #24: 0x0000000100117964
cc1plus`emit_mem_initializers(mem_inits=<unavailable>) at init.cc:1562:23
frame #25: 0x00000001001ebec0
cc1plus`::cp_parser_ctor_initializer_opt_and_function_body(parser=0x00000001045ac150,
in_function_try_block=false) at parser.cc:17188:29
frame #26: 0x00000001001ed6e0
cc1plus`::cp_parser_function_definition_after_declarator(parser=0x00000001045ac150,
inline_p=false) at parser.cc:32243:7
frame #27: 0x00000001001eecbe
cc1plus`::cp_parser_init_declarator(parser=0x00000001045ac150,
flags=<unavailable>, decl_specifiers=0x00007ff7bfeff4b0,
checks=0x0000000000000000, function_definition_allowed_p=<unavailable>,
member_p=false, declares_class_or_enum=0,
function_definition_p=0x00007ff7bfeff550,
maybe_range_for_decl=0x0000000000000000, init_loc=0x00007ff7bfeff474,
auto_result=0x00007ff7bfeff5f0) at parser.cc:32160:59
frame #28: 0x00000001001bcf23
cc1plus`::cp_parser_simple_declaration(parser=0x00000001045ac150,
function_definition_allowed_p=<unavailable>,
maybe_range_for_decl=0x0000000000000000) at parser.cc:15607:40
frame #29: 0x00000001001f63ed
cc1plus`::cp_parser_declaration(parser=0x00000001045ac150,
prefix_attrs=0x0000000000000000) at parser.cc:15293:33
frame #30: 0x00000001001f8bf4 cc1plus`c_parse_file() at parser.cc:15314:27
frame #31: 0x000000010034fede cc1plus`c_common_parse_file() at
c-opts.cc:1257:20
frame #32: 0x00000001015b5ce4 cc1plus`::compile_file() at toplev.cc:444:25
frame #33: 0x0000000101f96942 cc1plus`toplev::main(this=0x00007ff7bfeff92e,
argc=<unavailable>, argv=<unavailable>) at toplev.cc:2126:24
frame #34: 0x0000000101f9712e cc1plus`main(argc=6, argv=0x00007ff7bfeffa78)
at main.cc:39:23
