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From: "gilles.gouaillardet at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libfortran/108056] New: backward compatibility issue between 11 and 12 Date: Sun, 11 Dec 2022 06:37:19 +0000 [thread overview] Message-ID: <bug-108056-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108056 Bug ID: 108056 Summary: backward compatibility issue between 11 and 12 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libfortran Assignee: unassigned at gcc dot gnu.org Reporter: gilles.gouaillardet at gmail dot com Target Milestone: --- Created attachment 54062 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54062&action=edit a simple reproducer The attached program crashes when compiled on ubuntu 22.04 (jammy) based on debian bookworm with gfortran-11: $ gfortran bug.f90 $ ./a.out Internal Error: Invalid type in descriptor Error termination. Backtrace: #0 0x7f04aefe9ad0 in ??? #1 0x7f04aefea649 in ??? #2 0x7f04aefeae38 in ??? #3 0x7f04af22c8a4 in ??? #4 0x56490815c24e in ??? #5 0x56490815c1f3 in ??? #6 0x56490815c316 in ??? #7 0x56490815c352 in ??? #8 0x7f04aedc7d8f in __libc_start_call_main at ../sysdeps/nptl/libc_start_call_main.h:58 #9 0x7f04aedc7e3f in __libc_start_main_impl at ../csu/libc-start.c:392 #10 0x56490815c0c4 in ??? #11 0xffffffffffffffff in ??? After some investigations, I found gfortran-11 uses libgfortran built for gfortran-12. I guess the fine folks at debian chose to do so since the version library for libgfortran in 5.0.0 (from gfortran-8 up to gfortran-12, I did not test gfortran-13) and they assume or expect ABI and semantic compatibility. The issue can be reproduced by compiling the attached reproducer with gfortran-11, and running it after tweaking LD_LIBRARY_PATH so it uses libgfortran from gfortran-12. I think there are basically two ways to see this issue: - it should work, this is a bug in libfrotran-12 - libgfortran does not ensure such backward compatibility, and because of the semantic change, the library version should be/have been bumped ( e.g. 5.1.0 or 6.0.0) from gfortran-12. Once it is decided on how to move forward, I will be more than happy to report this to the debian folks. For the records, this issue came to my attention at https://stackoverflow.com/questions/74738981/the-use-mpi-f08-statement-causes-fortran-mpi-programs-to-crash-on-ubuntu-22-04/74742760#74742760
next reply other threads:[~2022-12-11 6:37 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-12-11 6:37 gilles.gouaillardet at gmail dot com [this message] 2022-12-11 7:05 ` [Bug libfortran/108056] " kargl at gcc dot gnu.org 2022-12-11 7:44 ` gilles.gouaillardet at gmail dot com 2022-12-11 7:51 ` gilles.gouaillardet at gmail dot com 2022-12-11 8:44 ` rimvydas.jas at gmail dot com 2022-12-11 13:19 ` [Bug libfortran/108056] [12/13 Regression] " rguenth at gcc dot gnu.org 2022-12-11 18:34 ` kargl at gcc dot gnu.org 2022-12-11 22:15 ` sandra at gcc dot gnu.org 2022-12-11 22:24 ` jakub at gcc dot gnu.org 2022-12-12 8:40 ` jakub at gcc dot gnu.org 2022-12-12 9:07 ` rguenther at suse dot de 2022-12-12 9:10 ` gilles.gouaillardet at gmail dot com 2022-12-12 12:09 ` burnus at gcc dot gnu.org 2022-12-12 12:34 ` rguenther at suse dot de 2022-12-15 11:27 ` cvs-commit at gcc dot gnu.org 2022-12-16 2:47 ` haochen.jiang at intel dot com 2022-12-16 7:48 ` burnus at gcc dot gnu.org 2022-12-16 7:57 ` cvs-commit at gcc dot gnu.org 2022-12-20 17:22 ` jakub at gcc dot gnu.org 2022-12-21 7:13 ` [Bug libfortran/108056] [12 " rguenth at gcc dot gnu.org 2022-12-21 7:23 ` cvs-commit at gcc dot gnu.org 2022-12-21 7:34 ` rguenth at gcc dot gnu.org
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