topic Segfault with procedure argument when -g supplied in Intel® Fortran Compiler

Segfault with procedure argument when -g supplied

zjibben — Thu, 07 Mar 2024 18:06:41 GMT

I've run into a bug with the latest version of ifx (2024.0.2 on Arch Linux). I'm getting a segfault with the following simple program:

program main implicit none abstract interface subroutine proc_t() end subroutine proc_t end interface integer :: i i = 1 call run(a) contains subroutine a() print *, i end subroutine a subroutine run(proc) procedure(proc_t) :: proc call proc end subroutine run end program main

The segfault occurs only when I compile with -g:

$ ifx main.F90 && ./a.out 1 $ ifx -g main.F90 && ./a.out ifx: remark #10440: Note that use of a debug option without any optimization-level option will turnoff most compiler optimizations similar to use of '-O0' forrtl: severe (174): SIGSEGV, segmentation fault occurred Image PC Routine Line Source libc.so.6 00001316EBF25770 Unknown Unknown Unknown Unknown 00007FFD21434938 Unknown Unknown Unknown

Re: Segfault with procedure argument when -g supplied

Barbara_P_Intel — Thu, 07 Mar 2024 22:29:03 GMT

Nice reproducer. Unfortunately, I cannot duplicate the segfault on Fedora 38 or Ubuntu 22.04.3.

Arch Linux is not supported by Intel.

What version of GCC is installed? gcc --version

Re: Segfault with procedure argument when -g supplied

zjibben — Thu, 07 Mar 2024 22:38:35 GMT

Oh interesting, maybe it's my system then. My gcc reports 13.2.1 20230801.

I just tried on a cluster with ifx 2023.1.0, running what seems like SUSE enterprise linux 15 with gcc 7.5.0. No error.

I'll see if I can get my hands on anything else.

Re: Segfault with procedure argument when -g supplied

zjibben — Fri, 08 Mar 2024 20:08:32 GMT

Alright, I managed to get my hands on a couple more systems.

Fedora 39, up to date with glibc 2.38, does not reproduce this error.

However Fedora Rawhide, up to date with glibc 2.39 (same as my Arch system), does reproduce the error. I also discovered that it's sufficient to only specify -O0 (-g isn't needed).