https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113580
Bug ID: 113580
Summary: -Wunused-parameter in template imported from module
causes segmentation fault
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: michael.kenzel at gmail dot com
Target Milestone: ---
The following example will reproduce the issue:
// A.ixx
export module A;
export void fun(auto&& x) {}
// main.cpp
import A;
int main()
{
fun(42);
}
g++ -std=c++23 -fmodules-ts -c -x c++ A.ixx
g++ -std=c++23 -Wunused-parameter -fmodules-ts main.cpp A.o
results in
Segmentation fault
0x7ff37686550f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x7ff37697e159 __strlen_avx2
../sysdeps/x86_64/multiarch/strlen-avx2.S:76
0x7ff3768506c9 __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
0x7ff376850784 __libc_start_main_impl
../csu/libc-start.c:360
