[Bug gdb/31256] Crash with basic 'list .'

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31256

--- Comment #9 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The gdb-14-branch branch has been updated by Guinevere Larsen
<blarsen@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4fe1a40c7c464bde0212aa859774fe59fb71ccfe

commit 4fe1a40c7c464bde0212aa859774fe59fb71ccfe
Author: Guinevere Larsen <blarsen@redhat.com>
Date:   Mon Jan 22 10:13:52 2024 +0100

    gdb: fix "list ." related crash

    When a user attempts to use the "list ." command with an inferior that
    doesn't have debug symbols, GDB would crash. This was reported as PR
    gdb/31256.

    The crash would happen when attempting to get the current symtab_and_line
    for the stop location, because the symtab would return a null pointer
    and we'd attempt to dereference it to print the line.

    This commit fixes that by checking for an empty symtab and erroring out
    of the function if it happens.

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31256
    Approved-By: Tom Tromey <tom@tromey.com>

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