https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105982
Bug ID: 105982
Summary: [13 Regression] internal compiler error: in
lookup_template_class, at cp/pt.cc:10361
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
I think this is a new-ish regression. It happens when running the libstdc++
testsuite with -std=c++20 i.e. in the $target/libstdc++-v3 build dir:
make check RUNTESTFLAGS="conformance.exp=21_strings/*/deduction.cc
--target_board=unix/-std=gnu++20"
In file included from
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/string:52,
from
/home/jwakely/src/gcc/gcc/libstdc++-v3/testsuite/21_strings/basic_string/cons/char/deduction.cc:20:
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:
In substitution of 'template<class _CharT, class _Traits, class _Alloc, class>
basic_string(typename std::__cxx11::basic_string<_CharT, _Traits,
_Alloc>::_Alloc_traits_impl<_Traits, void>::size_type, _CharT, const _Alloc&)->
std::__cxx11::basic_string<_CharT, _Traits, _Alloc> [with _CharT =
std::allocator<char>; _Traits = std::char_traits<std::allocator<char> >; _Alloc
= std::allocator<std::allocator<char> >; <template-parameter-1-4> =
std::allocator<std::allocator<char> >]':
/home/jwakely/src/gcc/gcc/libstdc++-v3/testsuite/21_strings/basic_string/cons/char/deduction.cc:53:
required from here
/home/jwakely/src/gcc/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:656:
internal compiler error: in lookup_template_class, at cp/pt.cc:10361
0x71a527 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:10361
0xb638d1 tsubst_aggr_type
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:13802
0xb638d1 tsubst_aggr_type
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:13753
0xb57c74 tsubst(tree_node*, tree_node*, int, tree_node*)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:16282
0xb643d4 tsubst_arg_types
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:15251
0xb64759 tsubst_arg_types
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:15228
0xb64759 tsubst_function_type
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:15406
0xb5766e tsubst(tree_node*, tree_node*, int, tree_node*)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:16200
0xb3ebe6 tsubst_function_decl
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:14179
0xb4198a tsubst_decl
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:14656
0xb56bf6 instantiate_template(tree_node*, tree_node*, int)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:21776
0xb6c88a fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:22289
0x960b81 add_template_candidate_real
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:3555
0x961bc3 add_template_candidate
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:3643
0x961bc3 add_candidates
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:6191
0x967d37 add_candidates
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:4717
0x967d37 perform_overload_resolution
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:4725
0x968179 perform_dguide_overload_resolution(tree_node*, vec<tree_node*, va_gc,
vl_embed> const*, int)
/home/jwakely/src/gcc/gcc/gcc/cp/call.cc:4789
0xb32b93 do_class_deduction
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:30214
0xb32b93 do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
/home/jwakely/src/gcc/gcc/gcc/cp/pt.cc:30302
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.
