https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124154
Bug ID: 124154
Summary: [this auto] ICE when handling lambda with `this auto`.
Product: gcc
Version: 15.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: shyeyian at petalmail dot com
Target Milestone: ---
hello.cpp:
=====
struct S
{
int x;
void f()
{
auto l = [&] (this auto) { (void)x; };
}
};
=====
command:
=====
[shyeyian@matebook test]$ g++ -std=c++23 hello.cpp
hello.cpp: In instantiation of 'S::f()::<lambda(this auto:1)> [with auto:1 =
S::f()::<lambda(this auto:1)>]':
hello.cpp:7:10: required from here
7 | l();
| ~^~
hello.cpp:6:42: internal compiler error: Segmentation fault
6 | auto l = [&] (this auto) { (void)x; };
| ^
0x26ef811 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2749918 internal_error(char const*, ...)
???:0
0x9423b5 perform_or_defer_access_check(tree_node*, tree_node*, tree_node*, int,
access_failure_info*)
???:0
0x943feb finish_non_static_data_member(tree_node*, tree_node*, tree_node*, int)
???:0
0x923a2a tsubst_tree_list(tree_node*, tree_node*, int, tree_node*)
???:0
0x928f4d instantiate_decl(tree_node*, bool, bool)
???:0
0x7b78d2 maybe_instantiate_decl(tree_node*)
???:0
0x7c9317 mark_used(tree_node*, int)
???:0
0x754c99 build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
???:0
0x946bb6 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0xa238f0 c_common_parse_file()
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gitlab.archlinux.org/archlinux/packaging/packages/gcc/-/issues>
for instructions.
[shyeyian@matebook test]$ g++ -std=c++23 hello.cpp
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/15.2.1/../../../../lib/Scrt1.o:
in function `_start':
(.text+0x1b): undefined reference to `main'
collect2: error: ld returned 1 exit status
[shyeyian@matebook test]$
=====
g++ version: 15.2
system: linux
