https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99879
--- Comment #2 from Alexander Lelyakin <alexander.lelyakin at googlemail dot
com> ---
The last sequence sometimes gives ICE in open, and sometimes in install entity:
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header memory
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header cstdio
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header span
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header shared_mutex
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header cstdint
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header clocale
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header bitset
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header semaphore
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header exception
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header numbers
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header charconv
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header locale
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header string
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header ranges
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header cstring
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header regex
----
In module imported at /usr/local/include/c++/11.0.1/regex:45:1:
/usr/local/include/c++/11.0.1/memory: note: unable to represent further
imported source locations
In file included from /usr/local/include/c++/11.0.1/sstream:38,
from /usr/local/include/c++/11.0.1/regex:46:
/usr/local/include/c++/11.0.1/istream:58:42: internal compiler error: in
install_entity, at cp/module.cc:7468
58 | class basic_istream : virtual public basic_ios<_CharT, _Traits>
| ^~~~~~~~~
0xa700a8 trees_in::install_entity(tree_node*)
../../gcc/gcc/cp/module.cc:7468
0xa785c6 trees_in::decl_value()
../../gcc/gcc/cp/module.cc:7980
0xa70f87 trees_in::tree_node(bool)
../../gcc/gcc/cp/module.cc:9153
0xa775ab module_state::read_cluster(unsigned int)
../../gcc/gcc/cp/module.cc:14811
0xa77aad module_state::load_section(unsigned int, binding_slot*)
../../gcc/gcc/cp/module.cc:18082
0xa77b6f module_state::lazy_load(unsigned int, binding_slot*)
../../gcc/gcc/cp/module.cc:18740
0xa71df0 trees_in::tree_node(bool)
../../gcc/gcc/cp/module.cc:9664
0xa772ab module_state::read_cluster(unsigned int)
../../gcc/gcc/cp/module.cc:14717
0xa77aad module_state::load_section(unsigned int, binding_slot*)
../../gcc/gcc/cp/module.cc:18082
0xa77b6f module_state::lazy_load(unsigned int, binding_slot*)
../../gcc/gcc/cp/module.cc:18740
0xa71df0 trees_in::tree_node(bool)
../../gcc/gcc/cp/module.cc:9664
0xa772ab module_state::read_cluster(unsigned int)
../../gcc/gcc/cp/module.cc:14717
0xa77aad module_state::load_section(unsigned int, binding_slot*)
../../gcc/gcc/cp/module.cc:18082
0xa77c68 lazy_load_binding(unsigned int, tree_node*, tree_node*, binding_slot*)
../../gcc/gcc/cp/module.cc:18773
0xa8988e name_lookup::search_namespace_only(tree_node*)
../../gcc/gcc/cp/name-lookup.c:928
0xa8aedb name_lookup::search_unqualified(tree_node*, cp_binding_level*)
../../gcc/gcc/cp/name-lookup.c:1158
0xa8dbe4 lookup_name_1
../../gcc/gcc/cp/name-lookup.c:7804
0xa8ddca lookup_name(tree_node*, LOOK_where, LOOK_want)
../../gcc/gcc/cp/name-lookup.c:7824
0xa9caa2 lookup_name(tree_node*, LOOK_want)
../../gcc/gcc/cp/name-lookup.h:401
0xa9caa2 cp_parser_lookup_name
../../gcc/gcc/cp/parser.c:29386
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
