our sub nesting and eval yields crash

This is a bug report for perl from zefram@fysh.org,
generated with the help of perlbug 1.44 running under perl 5.37.11.


-----------------------------------------------------------------
<!--[Please describe your issue here]-->

```
$ perl -lwe 'our sub foo; 0 if sub { eval "" if 0; \&foo if 0; }'
zsh: segmentation fault  perl -lwe 
```

Necessary elements to get this crash\: named sub declared with \"our\"
\(rather than \"my\" or \"state\" or as a package sub\)\; closure sub
\(either anonymous sub or \"my\" sub\)\; string eval use compiled inside
closure sub\; reference to the named sub compiled inside closure sub\;
closure constructed at runtime\. Non\-requirements\: string eval
doesn\'t need to execute\; reference to the named sub doesn\'t need to
execute\; order of the string eval and sub reference doesn\'t matter\;
closure doesn\'t need to be called\.

Adding \"\-Mfeature\=lexical\_subs\"\, this crash occurs all the way
back to Perl 5\.17\.4 when lexical subs were first introduced\.

<!--[Please do not change anything below this line]-->
<!------------------------------------------------------------------- -->


---
**Flags**
- category=core
- severity=medium
---
**Perl configuration**
```
This perlbug was built using Perl 5.32.1 - Fri Sep 24 16:10:58 UTC 2021
It is being executed now by  Perl 5.37.11 - Thu Apr 20 22:41:57 BST 2023.

Site configuration information for perl 5.37.11:

Configured by zefram at Thu Apr 20 22:41:57 BST 2023.

Summary of my perl5 (revision 5 version 37 subversion 11) configuration:
   
  Platform:
    osname=linux
    osvers=5.10.0-21-amd64
    archname=x86_64-linux-thread-multi
    uname='linux barba.rous.org 5.10.0-21-amd64 #1 smp debian 5.10.162-1 (2023-01-21) x86_64 gnulinux '
    config_args='-des -Dprefix=/home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52 -Duselargefiles -Dusethreads -Uafs -Ud_csh -Uusesfio -Uusenm -Duseshrplib -Dusedevel -Uversiononly -Ui_db'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=define
    usemultiplicity=define
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
  Compiler:
    cc='cc'
    ccflags ='-D_REENTRANT -D_GNU_SOURCE -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='-D_REENTRANT -D_GNU_SOURCE -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'
    ccversion=''
    gccversion='10.2.1 20210110'
    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='double'
    nvsize=8
    Off_t='off_t'
    lseeksize=8
    alignbytes=8
    prototype=define
  Linker and Libraries:
    ld='cc'
    ldflags =' -fstack-protector-strong -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib
    libs=-lpthread -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc
    perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc
    libc=libc-2.31.so
    so=so
    useshrplib=true
    libperl=libperl.so
    gnulibc_version='2.31'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=so
    d_dlsymun=undef
    ccdlflags='-Wl,-E -Wl,-rpath,/home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/lib/5.37.11/x86_64-linux-thread-multi/CORE'
    cccdlflags='-fPIC'
    lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector-strong'


---
@INC for perl 5.37.11:
    /home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/lib/site_perl/5.37.11/x86_64-linux-thread-multi
    /home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/lib/site_perl/5.37.11
    /home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/lib/5.37.11/x86_64-linux-thread-multi
    /home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/lib/5.37.11

---
Environment for perl 5.37.11:
    HOME=/home/zefram
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/zefram/usr/perl/perl_install/perl-5.37.11-i64-f52/bin:/home/zefram/usr/perl/util:/home/zefram/pub/x86_64-unknown-linux-gnu/bin:/home/zefram/pub/common/bin:/usr/bin:/bin:/usr/local/bin:/usr/games
    PERL_BADLANG (unset)
    SHELL=/usr/bin/zsh
```

• our sub nesting and eval yields crash by zefram via perl5-porters