https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123984
Bug ID: 123984
Summary: ICE accessible_base_p
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: 89.64.xjp at protonmail dot com
Target Milestone: ---
https://godbolt.org/z/sxnGcx17K
-----------------------------------------------
-std=c++26 -O3 -Wall -fno-exceptions -freflection -Wunused-but-set-variable=0
-fno-stack-protector -ftrivial-auto-var-init=uninitialized -D NDEBUG
-----------------------------------------------
#include <meta>
struct Impl;
consteval
{
define_aggregate(^^Impl, { data_member_spec(^^int, {.name{"_"}}) });
}
struct Tuple:Impl {};
constexpr int get(Tuple&& d)
{
return
static_cast<Impl*>(&d)->[:std::meta::nonstatic_data_members_of(^^Impl,
std::meta::access_context::unchecked())[0]:];
}
static_assert(get(Tuple{123}) == 123);
------------------------------------------------
<source>: In function 'constexpr int get(Tuple&&)':
<source>:13:33: internal compiler error: Segmentation fault
13 | return
static_cast<Impl*>(&d)->[:std::meta::nonstatic_data_members_of(^^Impl,
std::meta::access_context::unchecked())[0]:];
| ^
0x2958ff8 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x294dd3b internal_error(char const*, ...)
???:0
0xdf92b6 accessible_base_p(tree_node*, tree_node*, bool)
???:0
0xb78eaf convert_to_base(tree_node*, tree_node*, bool, bool, int)
???:0
0xb586ab perform_direct_initialization_if_possible(tree_node*, tree_node*,
bool, int)
???:0
0xe62eb5 build_static_cast(unsigned long, tree_node*, tree_node*, int)
???:0
0xd69d43 c_parse_file()
???:0
0xef3199 c_common_parse_file()
???:0
/cefs/5c/5c571c690dd13920e2194c24_gcc-trunk-20260204/bin/../libexec/gcc/x86_64-linux-gnu/16.0.1/cc1plus
-quiet -imultiarch x86_64-linux-gnu -iprefix
/cefs/5c/5c571c690dd13920e2194c24_gcc-trunk-20260204/bin/../lib/gcc/x86_64-linux-gnu/16.0.1/
-D_GNU_SOURCE -D NDEBUG <source> -quiet -dumpdir /app/ -dumpbase output.cpp
-dumpbase-ext .cpp -masm=intel -mtune=generic -march=x86-64 -g -O3 -Wall
-Wunused-but-set-variable=0 -std=c++26 -fdiagnostics-color=always
-fno-verbose-asm -fno-exceptions -freflection -fno-stack-protector
-ftrivial-auto-var-init=uninitialized -o /app/output.s
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
