❯ gdb --args perl -M5.041 -MDevel::Peek=Dump -Mexperimental=class -E'class Foo {}; Dump Foo->new'
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Reading symbols from perl...
(gdb) r
Starting program: /home/larsd/.local/share/perlbrew/perls/perl-5.41.8/bin/perl -M5.041 -MDevel::Peek=Dump -Mexperimental=class -Eclass\ Foo\ \{\}\;\ Dump\ Foo-\>new
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
SV = IV(0x55555555b6b8) at 0x55555555b6c8
  REFCNT = 1
  FLAGS = (ROK)
  RV = 0x55555555b530
  SV = PVOBJ(0x555555596390) at 0x55555555b530
    REFCNT = 1
    FLAGS = (OBJECT)
    STASH = 0x5555555f4cc0      "Foo"
    MAXFIELD = -1
    FIELDS = 0x555555596300
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7c9ac2f in Perl_do_sv_dump (level=1, file=0x555555576da0, sv=0x55555555b530, nest=1, maxnest=4, dumpops=false, pvlim=0)
    at dump.c:2852
2852                PADNAME **pname = PadnamelistARRAY(HvAUX(SvSTASH(sv))->xhv_class_fields);
(gdb) bt full
#0  0x00007ffff7c9ac2f in Perl_do_sv_dump (level=1, file=0x555555576da0, sv=0x55555555b530, nest=1, maxnest=4, dumpops=false,
    pvlim=0) at dump.c:2852
        count = <optimized out>
        svp = 0x555555596300
        pname = <optimized out>
        d = 0x55555555b8f0
        s = <optimized out>
        flags = <optimized out>
        type = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
#1  0x00007ffff7c999c7 in Perl_do_sv_dump (level=level@entry=0, file=0x555555576da0, sv=sv@entry=0x55555555b6c8, nest=nest@entry=0,
    maxnest=maxnest@entry=4, dumpops=dumpops@entry=false, pvlim=0) at dump.c:2170
        d = 0x55555555b4e8
        s = <optimized out>
        flags = <optimized out>
        type = 1
        p_ = <optimized out>
        p_ = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--c
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
        p_ = <optimized out>
#2  0x00007ffff7bec299 in S_do_dump (sv=0x55555555b6c8, lim=4)
    at /home/larsd/.local/share/perlbrew/build/perl-5.41.8/perl-5.41.8/ext/Devel-Peek/Peek.xs:334
        pv_lim_sv = <optimized out>
        pv_lim = 0
        dumpop = 0x55555559bc40
        save_dumpindent = 4
#3  0x00007ffff7bec34e in S_pp_dump () at /home/larsd/.local/share/perlbrew/build/perl-5.41.8/perl-5.41.8/ext/Devel-Peek/Peek.xs:347
        lim = <optimized out>
#4  0x00007ffff7d97b73 in Perl_runops_standard () at run.c:41
        op = <optimized out>
#5  0x00007ffff7c7a839 in S_run_body (oldscope=<optimized out>) at perl.c:2883
No locals.
#6  perl_run (my_perl=<optimized out>) at perl.c:2798
        oldscope = 1
        ret = <optimized out>
        cur_env = {je_prev = 0x7ffff7fb64a0 <PL_start_env>, je_buf = {{__jmpbuf = {140737488342840, -1470579409188483830, 0,
                140737488342888, 140737354125312, 93824992247120, 1470579407616412938, 1470597209553177866}, __mask_was_saved = 0,
              __saved_mask = {__val = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 93458488360960, 140737346446865, 1600877609,
                  16371054362459106048, 140737488342840, 6}}}}, je_ret = 0, je_mustcatch = false, je_old_delaymagic = 0,
          je_old_stack_hwm = 140737488342888}
        p_ = <optimized out>
#7  0x0000555555555232 in main (argc=<optimized out>, argv=<optimized out>, env=<optimized out>) at perlmain.c:127
        exitstatus = <optimized out>
        i = <optimized out>

Site configuration information for perl 5.41.8:
Configured by larsd at Thu Jan 30 10:51:22 CET 2025.
Summary of my perl5 (revision 5 version 41 subversion 8) configuration:
   
  Platform:
    osname=linux
    osvers=6.12.9-1-default
    archname=x86_64-linux-ld
    uname='linux denkheft 6.12.9-1-default #1 smp preempt_dynamic fri jan 10 08:30:10 utc 2025 (0ae2136) x86_64 x86_64 x86_64 gnulinux '
    config_args='-de -Dprefix=/home/larsd/.local/share/perlbrew/perls/perl-5.41.8 -Dusedevel -Duseshrplib -Dman1dir=none -Dman3dir=none -Dcf_email=root@localhost -Dperladmin=root@localhost -Dusemorebits -Dusesitecustomize -Dusedevel -Accflags=-DNO_TAINT_SUPPORT -Accflags=-march=native -Accflags=-fPIC -Accflags=-DPERL_DISABLE_PMC -Accflags=-ggdb -Aeval:scriptdir=/home/larsd/.local/share/perlbrew/perls/perl-5.41.8/bin'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=undef
    usemultiplicity=undef
    use64bitint=define
    use64bitall=define
    uselongdouble=define
    usemymalloc=n
    default_inc_excludes_dot=define
  Compiler:
    cc='cc'
    ccflags ='-DNO_TAINT_SUPPORT -march=native -fPIC -DPERL_DISABLE_PMC -ggdb -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'
    optimize='-O2'
    cppflags='-DNO_TAINT_SUPPORT -march=native -fPIC -DPERL_DISABLE_PMC -ggdb -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'
    ccversion=''
    gccversion='14.2.1 20241007 [revision 4af44f2cf7d281f3e4f3957efce10e8b2ccb2ad3]'
    gccosandvers=''
    intsize=4
    longsize=8
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=define
    longlongsize=8
    d_longdbl=define
    longdblsize=16
    longdblkind=3
    ivtype='long'
    ivsize=8
    nvtype='long double'
    nvsize=16
    Off_t='off_t'
    lseeksize=8
    alignbytes=16
    prototype=define
  Linker and Libraries:
    ld='cc'
    ldflags =' -fstack-protector-strong -L/usr/local/lib'
    libpth=/usr/local/lib /lib/../lib64 /usr/lib/../lib64 /lib /usr/lib /lib64 /usr/lib64 /usr/local/lib64
    libs=-lpthread -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
    perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc
    libc=/lib/../lib64/libc.so.6
    so=so
    useshrplib=true
    libperl=libperl.so
    gnulibc_version='2.40'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=so
    d_dlsymun=undef
    ccdlflags='-Wl,-E -Wl,-rpath,/home/larsd/.local/share/perlbrew/perls/perl-5.41.8/lib/5.41.8/x86_64-linux-ld/CORE'
    cccdlflags='-fPIC'
    lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector-strong'
---
@INC for perl 5.41.8:
    /home/larsd/.local/share/perlbrew/perls/perl-5.41.8/lib/site_perl/5.41.8/x86_64-linux-ld
    /home/larsd/.local/share/perlbrew/perls/perl-5.41.8/lib/site_perl/5.41.8
    /home/larsd/.local/share/perlbrew/perls/perl-5.41.8/lib/5.41.8/x86_64-linux-ld
    /home/larsd/.local/share/perlbrew/perls/perl-5.41.8/lib/5.41.8
---
Environment for perl 5.41.8:
    HOME=/home/larsd
    LANG=de_DE.UTF-8
    LANGUAGE=
    LC_CTYPE=de_DE.UTF-8
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/larsd/.local/share/perlbrew/bin:/home/larsd/.local/share/perlbrew/perls/perl-5.41.8/bin:/home/larsd/.local/bin:/home/larsd/.local/share/asdf/shims:/home/larsd/.local/share/asdf/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin
    PERLBREW_HOME=/home/larsd/.local/share/perlbrew
    PERLBREW_MANPATH=/home/larsd/.local/share/perlbrew/perls/perl-5.41.8/man
    PERLBREW_PATH=/home/larsd/.local/share/perlbrew/bin:/home/larsd/.local/share/perlbrew/perls/perl-5.41.8/bin
    PERLBREW_PERL=perl-5.41.8
    PERLBREW_ROOT=/home/larsd/.local/share/perlbrew
    PERLBREW_SHELLRC_VERSION=0.98
    PERLBREW_VERSION=0.98
    PERLCRITIC=/home/larsd/.config/perlcriticrc
    PERLREPL_HISTFILE=/home/larsd/.local/state/perlreplhist
    PERLTIDY=/home/larsd/.config/perltidyrc
    PERL_BADLANG (unset)
    PERL_CPANM_HOME=/home/larsd/.cache/cpanm
    PERL_CPANM_OPT=-M https://cpan.metacpan.org/ --verify --with-recommends --with-suggests --with-develop --with-all-features
    PERL_EXTUTILS_AUTOINSTALL=--default-deps
    PERL_MM_NONINTERACTIVE=1
    PERL_MM_USE_DEFAULT=1
    SHELL=/bin/bash