https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110805
Bug ID: 110805
Summary: g++ crash on modules with exported class providing
string constant with obscure content
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jo.hiller+gcc at gmail dot com
Target Milestone: ---
Created attachment 55630
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55630&action=edit
output of -freport-bug
// Info
gcc-13 --version
gcc-13 (Homebrew GCC 13.1.0) 13.1.0
macOS 13.5, arm64, Apple M1 MAX
// Steps to reproduce
* use a C++20 module with exported class providing obscure string constant
* gcc 13.1 crash with "m.cc:3:8: internal compiler error: Segmentation fault:
11"
// m.cc
module;
#include <string>
export module m;
export class Constants {
public:
inline static const std::string CONST_CRASH_1 = "Bundle-Activator";
};
// build
gcc-13 -freport-bug -std=c++20 -xc++ -fmodules-ts -fmodule-only -Wall -Wextra
m.cc
# see attached output file ccRJ91Vu.out
// notes
* exported string constants outside exported class do work
* string constants with different types/values do work as well, see different
string value, very obscure
static constexpr std::string_view CONST_OK_1 = "Bundle-Activator";
inline static const std::string CONST_OK_2 = "bundleactivator";
inline static const std::string CONST_OK_3 = "Bundle-Activato";
inline static const std::string CONST_OK_4 = "undle-Activator";
inline static const std::string CONST_OK_5 = "xxxXactivatorll";
* these string constants do fail as well
inline static const std::string CONST_CRASH_2 = "xxxbundleXactivatorlll";
inline static const std::string CONST_CRASH_3 = "xxxXactivatorlll";
inline static const std::string CONST_CRASH_4 = "xxxXactivatorlll";
* it seems this pattern ".*.activator.*" triggeres special handling in gcc-13,
lower/upper case seems not to be relevant, but number of characters
before/after
