https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102643
Bug ID: 102643
Summary: Segfault in alias template deduction
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: michael at cadilhac dot name
Target Milestone: ---
Created attachment 51566
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51566&action=edit
File witnessing bug.
$ uname -a
Linux pin 5.14.7-arch1-1 #1 SMP PREEMPT Wed, 22 Sep 2021 21:35:11 +0000 x86_64
GNU/Linux
$ g++ --version
g++ (GCC) 11.1.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++ bug.cc -std=c++20
In file included from /usr/include/c++/11.1.0/vector:67,
from bug.cc:1:
/usr/include/c++/11.1.0/bits/stl_vector.h: In function
‘vector(std::initializer_list<_Tp>, const std::allocator<_Up>&)->
std::vector<T> [with T = char]’:
/usr/include/c++/11.1.0/bits/stl_vector.h:626:42: internal compiler error:
Segmentation fault
626 | const allocator_type& __a = allocator_type())
| ^~~~~~~~~~~~~~~~
0x1797368 internal_error(char const*, ...)
???:0
0x7e73b1 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0x7fa400 tsubst_template_args(tree_node*, tree_node*, int, tree_node*)
???:0
0x7e875d tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0x7fc222 tsubst_default_argument(tree_node*, int, tree_node*, tree_node*, int)
???:0
0x68bb2b convert_default_arg(tree_node*, tree_node*, tree_node*, int, int)
???:0
0x69950a build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0x7e0ba8 do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
???:0
0x851e94 build_functional_cast(unsigned int, tree_node*, tree_node*, int)
???:0
0x7ce2fe c_parse_file()
???:0
0x8a252d c_common_parse_file()
???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://bugs.archlinux.org/> for instructions.
$
