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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/99222] New: [modules] system header-unit ICEs
Date: Tue, 23 Feb 2021 17:59:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99222

            Bug ID: 99222
           Summary: [modules] system header-unit ICEs
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nathan at gcc dot gnu.org
  Target Milestone: ---

Another, shorter sequence:
----
g++ -std=3Dc++20 -fmodules-ts -x c++-system-header new
g++ -std=3Dc++20 -fmodules-ts -x c++-system-header initializer_list
g++ -std=3Dc++20 -fmodules-ts -x c++-system-header typeinfo
g++ -std=3Dc++20 -fmodules-ts -x c++-system-header type_traits
g++ -std=3Dc++20 -fmodules-ts -x c++-system-header exception
----
/usr/local/include/c++/11.0.0/exception: internal compiler error: in
write_cluster, at cp/module.cc:14600
0x6e2d56 module_state::write_cluster(elf_out*, depset**, unsigned int,
depset::hash&, unsigned int*, unsigned int*)
        ../../gcc/gcc/cp/module.cc:14600
0xa62be8 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17734
0xa638fc finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19860
0x9f72cb c_parse_final_cleanups()
        ../../gcc/gcc/cp/decl2.c:5175=