5.36.2a t/porting/regen.t blows up under macOS: undefined current object: op.o

[trwyant]

Module:

Description
When running the Perl test suite, t/porting/regen.t failed as follows:

t/porting/libperl ................................................ porting/libperl.t: undefined current object: op.o: at porting/libperl.t line 242, <$nm_fh> line 2.
FAILED--no leader found

./perl harness added nothing that appears interesting, at least not that I can tell.

porting/libperl.t: undefined current object: op.o: at porting/libperl.t line 242, <$nm_fh> line 2.
porting/libperl.t ....................................................
Dubious, test returned 29 (wstat 7424, 0x1d00)
No subtests run

./perl -I. -MTestInit t/porting/regen.t (stolen from #21671) ran to completion with no failing tests, but I don't know what that means.

Steps to Reproduce
Sorry, it's more than just a one-liner:

• Download https://www.leonerd.org.uk/perl-releases/perl-5.36.2.tar.gz. I did this with wget 2023-11-27 16:16 Z per the time stamp on the file.
• Expand this and cd into the directory
• $ bash Configure -Dprefix=/trw/local/perl/5.36.2 -Dcf_email=wyant@cpan.org -Uinstallusrbinperl -e
• $ make
• $ make test

Expected behavior

Passing test

Perl configuration

Summary of my perl5 (revision 5 version 36 subversion 2) configuration:
   
  Platform:
    osname=darwin
    osvers=22.6.0
    archname=darwin-2level
    uname='darwin samwise.local 22.6.0 darwin kernel version 22.6.0: wed oct 4 21:25:26 pdt 2023; root:xnu-8796.141.3.701.17~4release_x86_64 x86_64 '
    config_args='-Dprefix=/trw/local/perl/5.36.2 -Dcf_email=wyant@cpan.org -Uinstallusrbinperl -e -d'
    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 -mmacosx-version-min=13.6 -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -I/opt/local/include -DPERL_USE_SAFE_PUTENV'
    optimize='-O3'
    cppflags='-fno-common -DPERL_DARWIN -mmacosx-version-min=13.6 -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -I/opt/local/include'
    ccversion=''
    gccversion='Apple LLVM 14.0.3 (clang-1403.0.22.14.1)'
    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 =' -mmacosx-version-min=13.6 -fstack-protector-strong -L/usr/local/lib -L/opt/local/lib'
    libpth=/usr/local/lib /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.3/lib /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib /opt/local/lib /usr/lib
    libs=-lgdbm
    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=' -mmacosx-version-min=13.6 -bundle -undefined dynamic_lookup -L/usr/local/lib -L/opt/local/lib -fstack-protector-strong'


Characteristics of this binary (from libperl): 
  Compile-time options:
    HAS_TIMES
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    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 Nov 27 2023 10:39:24
  @INC:
    /trw/local/perl/5.36.2/lib/site_perl/5.36.2/darwin-2level
    /trw/local/perl/5.36.2/lib/site_perl/5.36.2
    /trw/local/perl/5.36.2/lib/5.36.2/darwin-2level
    /trw/local/perl/5.36.2/lib/5.36.2


$ uname -a
Darwin Samwise.local 22.6.0 Darwin Kernel Version 22.6.0: Wed Oct  4 21:25:26 PDT 2023; root:xnu-8796.141.3.701.17~4/RELEASE_X86_64 x86_64

[Leont]

Frankly, libperl.t is so fragile we should consider eliminating it entirely.

[trwyant]

I haven't exercised 5.36.2a extensively, but I do know I have found nothing wrong with 5.38.1 built on the same system other than the test failure that 5.38.1a was supposed to fix.

Please let me know what other information I can provide. My XCode is 14.3.1.

[trwyant]

Same result with https://www.leonerd.org.uk/tmp/perl-5.36.3.tar.gz

t/porting/libperl ................................................ porting/libperl.t: undefined current object: op.o: at porting/libperl.t line 242, <$nm_fh> line 2.
FAILED--no leader found

[trwyant]

Have not used 5.36.3 a lot, but installed all my usual modules without problems. I assume the error is cosmetic.

[tonycoz]

This was fixed for 5.38 in b1db177 and hasn't been backported to maint-*

You can ignore the message.

I expect we should be disabling this test for maint, or at least when run outside of perl's .git.

[trwyant]

Confirmed with blead, specifically c9e6b69, which is a descendant of b1db177.