[Bug c++/99238] New: [modules] internal compiler error: segmentation fault

[Bug c++/99238] New: [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

            Bug ID: 99238
           Summary: [modules] internal compiler error: segmentation fault
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alexander.lelyakin at googlemail dot com
  Target Milestone: ---

g++ -std=c++20 -fmodules-ts -x c++-system-header optional
g++ -std=c++20 -fmodules-ts -x c++-system-header condition_variable
g++ -std=c++20 -fmodules-ts -x c++-system-header ranges
g++ -std=c++20 -fmodules-ts -x c++-system-header cstdlib
g++ -std=c++20 -fmodules-ts -x c++-system-header set
g++ -std=c++20 -fmodules-ts -x c++-system-header iomanip
-------
/usr/local/include/c++/11.0.0/iomanip: internal compiler error: Segmentation
fault
0x10fb80f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6de77a trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4896
0x6de77a trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7203
0x6de77a trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7186
0xa5beec trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9053
0xa5de21 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8776
0xa5c2ea trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9136
0xa5dbdc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8694
0xa5c2ea trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9136
0xa5e064 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8803
0xa5c2ea trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9136
0xa5cc1f trees_out::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6106
0xa5dafc trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7166
0xa5dafc trees_out::fn_parms_init(tree_node*)
        ../../gcc/gcc/cp/module.cc:10067
0xa5aa96 trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7763
0xa61fd3 depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13235
0xa62625 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17611
0xa638fc finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19860
0x9f72cb c_parse_final_cleanups()
        ../../gcc/gcc/cp/decl2.c:5175
-----
g++ (GCC) 11.0.0 20210223 (experimental)

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

--- Comment #1 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
There is a shorter sequence:

g++ -std=c++20 -fmodules-ts -x c++-system-header fstream
g++ -std=c++20 -fmodules-ts -x c++-system-header string_view
g++ -std=c++20 -fmodules-ts -x c++-system-header locale
----
/usr/local/include/c++/11.0.1/locale: internal compiler error: Segmentation
fault
0x10fc36f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6de73c trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4898
0x6de73c trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7205
0x6de73c trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7188
0xa5c4dc trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9055
0xa5e411 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8778
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e1cc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8696
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e654 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8805
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e1cc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8696
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5d20f trees_out::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6108
0xa5e0ec trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7168
0xa5e0ec trees_out::fn_parms_init(tree_node*)
        ../../gcc/gcc/cp/module.cc:10069
0xa5b086 trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7765
0xa625c3 depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13237
0xa62c28 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17652
0xa640cf finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19922
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.
----
g++ (GCC) 11.0.1 20210228 (experimental)

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

--- Comment #2 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
Even shorter sequence:

g++ -std=c++20 -fmodules-ts -x c++-system-header stdexcept
g++ -std=c++20 -fmodules-ts -x c++-system-header stop_token
----
/usr/local/include/c++/11.0.1/stop_token: internal compiler error: Segmentation
fault
0x10fee8f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6deab8 trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4783
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7090
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7073
0xa5dfdc trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8978
0xa5fec9 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8701
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa5cbda trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7053
0xa5cbda trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7640
0xa5d1ab trees_out::decl_node(tree_node*, walk_kind)
        ../../gcc/gcc/cp/module.cc:8549
0xa5e1a2 trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9104
0xa5e66d trees_out::vec_chained_decls(tree_node*)
        ../../gcc/gcc/cp/module.cc:4879
0xa6255b trees_out::write_class_def(tree_node*)
        ../../gcc/gcc/cp/module.cc:11642
0xa6424c depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13172
0xa64668 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17644
0xa65aff finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19884
0x9f901b c_parse_final_cleanups()
        ../../gcc/gcc/cp/decl2.c:5175
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.
----
g++ (GCC) 11.0.1 20210308 (experimental)
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.

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

--- Comment #3 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
About half of sequences of headers producing segmentation fault are stopped on
<stop_token>.
However there are another variants:
----
g++ -std=c++20 -fmodules-ts -x c++-system-header stdexcept
g++ -std=c++20 -fmodules-ts -x c++-system-header locale
----
/usr/local/include/c++/11.0.1/locale: internal compiler error: Segmentation
fault
0x10fee8f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6deab8 trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4783
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7090
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7073
0xa5dfdc trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8978
0xa5fec9 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8701
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa5fccc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8619
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa60104 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8728
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa5ed0f trees_out::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:5993
0xa5fbec trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7053
0xa5fbec trees_out::fn_parms_init(tree_node*)
        ../../gcc/gcc/cp/module.cc:9992
0xa5c4c4 trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7625
0xa63fd1 depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13169
0xa64668 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17644
0xa65aff finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19884
0x9f901b c_parse_final_cleanups()
        ../../gcc/gcc/cp/decl2.c:5175
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.
----
g++ (GCC) 11.0.1 20210308 (experimental)
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.

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2021-03-12

--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
// pr99238.h
struct tm;

// pr99238_a.H
#include "pr99238.h"

// pr99238_b.H
#include "pr99238.h"
import "pr99238_a.H";
namespace std
{
  using ::tm;
}

zathras:116>./cc1plus -quiet -fmodule-header pr99238_a.H && ./cc1plus -quiet
-fmodule-header pr99238_b.H            
pr99238_b.H: internal compiler error: Segmentation fault
0x16c420a crash_signal
        ../../../src/gcc/toplev.c:327
0xcb70b2 trees_out::get_tag(tree_node*)
        ../../../src/gcc/cp/module.cc:4779
0xcc01d2 trees_out::ref_node(tree_node*)
        ../../../src/gcc/cp/module.cc:7086
0xcc93ab trees_out::tree_node(tree_node*)
        ../../../src/gcc/cp/module.cc:8974
0xcde8cf depset::hash::find_dependencies(module_state*)
        ../../../src/gcc/cp/module.cc:13114
0xceb673 module_state::write(elf_out*, cpp_reader*)
        ../../../src/gcc/cp/module.cc:17618

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathan Sidwell <nathan@gcc.gnu.org>:

https://gcc.gnu.org/g:6e885ad3287388192e52e9b524dbaa408507c0a4

commit r11-7651-g6e885ad3287388192e52e9b524dbaa408507c0a4
Author: Nathan Sidwell <nathan@acm.org>
Date:   Fri Mar 12 09:02:41 2021 -0800

    c++: ICE with using-decl [PR 99238]

    This ICE was caused by a stray TREE_VISITED marker.  The lookup
    machinery was leaving it there due to the way I'd arranged for it to
    be cleared.  That was presuming the name_lookup::value field didn't
    change, and that wasn't always true in the using-decl processing.  I
    took the opportunity to break out a helper, and then call it
    immediately after lookups, rather than wait until destructor time.
    Added some asserts the module machinery to catch further cases of
    this.

            PR c++/99238
            gcc/cp/
            * module.cc (depset::hash::add_binding_entity): Assert not
            visited.
            (depset::add::add_specializations): Likewise.
            * name-lookup.c (name_lookup::dedup): New.
            (name_lookup::~name_lookup): Assert not deduping.
            (name_lookup::restore_state): Likewise.
            (name_lookup::add_overload): Replace outlined code with dedup
            call.
            (name_lookup::add_value): Likewise.
            (name_lookup::search_namespace_only): Likewise.
            (name_lookup::adl_namespace_fns): Likewise.
            (name_lookup::adl_class_fns): Likewise.
            (name_lookup::search_adl): Likewise.  Add clearing dedup call.
            (name_lookup::search_qualified): Likewise.
            (name_lookup::search_unqualified): Likewise.
            gcc/testsuite/
            * g++.dg/modules/pr99238.h: New.
            * g++.dg/modules/pr99238_a.H: New.
            * g++.dg/modules/pr99238_b.H: New.

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
* 6e885ad3287 2021-03-12 | c++: ICE with using-decl [PR 99238]

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

Alexander Lelyakin <alexander.lelyakin at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #7 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
g++ -std=c++20 -fmodules-ts -x c++-system-header condition_variable
g++ -std=c++20 -fmodules-ts -x c++-system-header numbers
g++ -std=c++20 -fmodules-ts -x c++-system-header type_traits
g++ -std=c++20 -fmodules-ts -x c++-system-header future
----
In file included from /usr/local/include/c++/11.0.1/future:43:
/usr/local/include/c++/11.0.1/bits/atomic_futex.h:82:7: internal compiler
error: Segmentation fault
   82 |     { }
      |       ^
0x10ffe0f crash_signal
        ../../gcc/gcc/toplev.c:327
0xc2bb99 clear_marks
        ../../gcc/gcc/ggc-page.c:1895
0xc2d16c ggc_collect()
        ../../gcc/gcc/ggc-page.c:2219
0xacd901 cp_parser_function_definition_after_declarator
        ../../gcc/gcc/cp/parser.c:30020
0xacddac cp_parser_late_parsing_for_member
        ../../gcc/gcc/cp/parser.c:30914
0xaa80a3 cp_parser_class_specifier_1
        ../../gcc/gcc/cp/parser.c:25158
0xaa8fb3 cp_parser_class_specifier
        ../../gcc/gcc/cp/parser.c:25182
0xaa8fb3 cp_parser_type_specifier
        ../../gcc/gcc/cp/parser.c:18429
0xaa9f49 cp_parser_decl_specifier_seq
        ../../gcc/gcc/cp/parser.c:15051
0xad4b06 cp_parser_single_declaration
        ../../gcc/gcc/cp/parser.c:30412
0xad4e86 cp_parser_template_declaration_after_parameters
        ../../gcc/gcc/cp/parser.c:30075
0xad5630 cp_parser_explicit_template_declaration
        ../../gcc/gcc/cp/parser.c:30341
0xad7d59 cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:14057
0xad7329 cp_parser_toplevel_declaration
        ../../gcc/gcc/cp/parser.c:14155
0xad7329 cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:13943
0xad77c2 cp_parser_namespace_body
        ../../gcc/gcc/cp/parser.c:20443
0xad77c2 cp_parser_namespace_definition
        ../../gcc/gcc/cp/parser.c:20421
0xad7f18 cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:14106
0xad876c cp_parser_toplevel_declaration
        ../../gcc/gcc/cp/parser.c:14155
0xad876c cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:4940
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.
----
g++ (GCC) 11.0.1 20210312 (experimental)
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.

[Bug c++/99238] [modules] internal compiler error: segmentation fault

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #8 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
please don;t reopen bugs with different ICEs