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From: "gnu.w2nnu at simplelogin dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105512] compilation with -fmodules-ts and std=c++20 leads
 to segfault
Date: Sun, 18 Jun 2023 18:02:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105512

David Truby <gnu.w2nnu at simplelogin dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gnu.w2nnu at simplelogin d=
ot com

--- Comment #1 from David Truby <gnu.w2nnu at simplelogin dot com> ---
I also see this issue and have a reproducer here:
---- main.cpp
#include <iostream>
#include <string>
import test;

int main() {
        std::cout << tester();
}

---- test.cpp
module;=20
#include <string>
export module test;

export std::string tester() {
        return "hello world\n";
}

----

Interestingly the issue also goes away if -D_GLIBCXX_USE_CXX11_ABI=3D0 is p=
assed
to both TUs so I suspect there's an issue with the module file not exporting
the correct ABI for `std::string`=