builtin::indexed: Segfault during syntax check with builtin::indexed and lexical subroutine

[kfly8]

Module:

Description

Segmentation fault occurs when running on a script that combines:

1. builtin::indexed
2. lexcial subroutine

Steps to Reproduce

Create a file a.pl with the following content:

use v5.42;

my sub foo(@list) {
    for my ($i, $v) (indexed @list) {
        say "$i: $v";
    }
}

# Following are working:
#
# my sub foo(@list) {
#     for my ($i, $v) (builtin::indexed @list) {
#         say "$i: $v";
#     }
# }
#
# sub foo(@list) {
#     for my ($i, $v) (indexed @list) {
#         say "$i: $v";
#     }
# }

foo('a', 'b', 'c');

Then run:
perl a.pl

Expected behavior

If run perl a.pl, then print elements of list.

Perl configuration

Summary of my perl5 (revision 5 version 42 subversion 0) configuration:
   
  Platform:
    osname=darwin
    osvers=23.6.0
    archname=darwin-2level
    uname='darwin mac-1751572464836.local 23.6.0 darwin kernel version 23.6.0: thu apr 24 20:27:23 pdt 2025; root:xnu-10063.141.1.705.2~1release_arm64_vmapple arm64 '
    config_args='-Dprefix=/opt/perl -Duserelocatableinc -Dman1dir=none -Dman3dir=none -DDEBUGGING=-g -des'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=undef
    usemultiplicity=undef
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
  Compiler:
    cc='cc'
    ccflags ='-fno-common -DPERL_DARWIN -DNO_THREAD_SAFE_QUERYLOCALE -DNO_POSIX_2008_LOCALE -DHAS_BROKEN_LANGINFO_CODESET -fno-strict-aliasing -pipe -fstack-protector-strong'
    optimize='-O3 -g'
    cppflags='-fno-common -DPERL_DARWIN -DNO_THREAD_SAFE_QUERYLOCALE -DNO_POSIX_2008_LOCALE -DHAS_BROKEN_LANGINFO_CODESET -fno-strict-aliasing -pipe -fstack-protector-strong'
    ccversion=''
    gccversion='Apple LLVM 15.0.0 (clang-1500.3.9.4)'
    gccosandvers=''
    intsize=4
    longsize=8
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=define
    longlongsize=8
    d_longdbl=define
    longdblsize=8
    longdblkind=0
    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'
    libpth=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/15.0.0/lib /Applications/Xcode_15.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib /Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib /usr/lib
    libs= 
    perllibs=
    libc=
    so=dylib
    useshrplib=false
    libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=bundle
    d_dlsymun=undef
    ccdlflags=' '
    cccdlflags=' '
    lddlflags='-bundle -undefined dynamic_lookup -fstack-protector-strong'


Characteristics of this binary (from libperl): 
  Compile-time options:
    HAS_LONG_DOUBLE
    HAS_STRTOLD
    HAS_TIMES
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_HASH_FUNC_SIPHASH13
    PERL_HASH_USE_SBOX32
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    PERL_USE_SAFE_PUTENV
    USE_64_BIT_ALL
    USE_64_BIT_INT
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
  Built under darwin
  Compiled at Jul  3 2025 20:07:15
  @INC:
    /Users/kfly8/.local/share/mise/installs/perl/5.42.0.0/perl-darwin-arm64/lib/site_perl/5.42.0/darwin-2level
    /Users/kfly8/.local/share/mise/installs/perl/5.42.0.0/perl-darwin-arm64/lib/site_perl/5.42.0
    /Users/kfly8/.local/share/mise/installs/perl/5.42.0.0/perl-darwin-arm64/lib/5.42.0/darwin-2level
    /Users/kfly8/.local/share/mise/installs/perl/5.42.0.0/perl-darwin-arm64/lib/5.42.0