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From: "ian at geometrian dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107864] New: Internal Compiler Error (Large Project, C++20)
Date: Thu, 24 Nov 2022 19:17:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107864

            Bug ID: 107864
           Summary: Internal Compiler Error (Large Project, C++20)
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ian at geometrian dot com
  Target Milestone: ---

Created attachment 53962
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53962&action=3Dedit
".zip" file containing "main.cpp", the repro

Using g++ built from source yesterday, getting internal compiler error
(segfault) on a large C++20 project. A preprocessed file (lightly edited and
zipped for file size limit) reproducing the error is attached.

Compiled with:

    g++ main.cpp -std=3Dc++20 -mavx2

The output begins with:

    In file included from
/path/to/mycodedistr/include/mycode/grfx/_cpu/../color/../../_stdafx/matr.h=
pp:7,
                     from
/path/to/mycodedistr/include/mycode/grfx/_cpu/../color/../../_stdafx.hpp:25=
4,
                     from
/path/to/mycodedistr/include/mycode/grfx/_cpu/../color/tuples.hpp:3,
                     from
/path/to/mycodedistr/include/mycode/grfx/_cpu/framebuffer.hpp:3,
                     from
/path/to/mycodedistr/src/mycode/grfx/_cpu/framebuffer.cpp:1:
=20=20=20
/path/to/mycodedistr/include/mycode/grfx/_cpu/../color/../../_stdafx/_math.=
hpp:
In instantiation of =E2=80=98T BR::Math::round(const T&) requires=20
is_floating_point_v<T> [with T =3D float]=E2=80=99:
    /path/to/mycodedistr/include/mycode/grfx/color/convert.hpp:132:29:=20=20
required from here
=20=20=20
/path/to/mycodedistr/include/mycode/grfx/_cpu/../color/../../_stdafx/_math.=
hpp:111:23:
internal compiler error: Segmentation fault
    0x7f3e5c1be51f ???
        ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
    0x7f3e5c1a5d8f __libc_start_call_main
        ../sysdeps/nptl/libc_start_call_main.h:58
    0x7f3e5c1a5e3f __libc_start_main_impl
        ../csu/libc-start.c:392
    Please submit a full bug report

"gcc -v" includes:

    Target: x86_64-pc-linux-gnu
    Configured with: ../gcc-src/configure --enable-languages=3Dc,c++
--enable-multiarch --program-suffix=3D-trunk
    gcc version 13.0.0 20221124 (experimental) (GCC)=