autopkgtest failure with perl/5.38.2-3.2

[Zixing Liu]

autopkgtest failed with (https://autopkgtest.ubuntu.com/results/autopkgtest-noble/noble/arm64/p/perl/20240326_162839_855b1@/log.gz):

3968s control.t: warning: can't parse dependency ${t64:Provides}
3968s
3968s # Failed test 'Breaks for libfilter-perl in libperl5.38t64 implies Provides'
3968s # at debian/t/control.t line 267.
3968s
3968s # Failed test 'Breaks for libfilter-perl in libperl5.38t64 implies Replaces'
3968s # at debian/t/control.t line 269.
3968s Use of uninitialized value $replaced_version in substitution (s///) at debian/t/control.t line 273.
3969s
3969s # Failed test 'Replaces version for libfilter-perl in libperl5.38t64 matches Breaks'
3969s # at debian/t/control.t line 274.
3969s # got: undef
3969s # expected: '1.64'
3969s
3969s # Failed test 'Provides version for libfilter-perl in libperl5.38t64 matches Breaks'
3969s # at debian/t/control.t line 280.
3969s # got: ''
3969s # expected: '1.64'
3969s # s/libfilter-perl,/libfilter-perl (= 1.64),/
3969s # Looks like you failed 4 tests of 626.
3969s debian/t/control.t ..
3969s Dubious, test returned 4 (wstat 1024, 0x400)
3969s Failed 4/626 subtests
3969s (less 214 skipped subtests: 408 okay)

[Gianfranco Costamagna (costamagnagianfranco)]

Hello, I found this

# list special cases where a Breaks entry doesn't need to imply
# Replaces+Provides
my %triplet_check_skip = (
        "perl-base" => [ "libfile-spec-perl" ],
        "libperl5.38" => [ "libfilter-perl" ],
);

Maybe we can do something like
# list special cases where a Breaks entry doesn't need to imply
# Replaces+Provides
my %triplet_check_skip = (
        "perl-base" => [ "libfile-spec-perl" ],
        "libperl5.38" => [ "libfilter-perl" ],
        "libperl5.38t64" => [ "libfilter-perl" ],
);

or similar?

[Łukasz Zemczak (sil2100)]

On one side I'd like us to take a look at the perl failures for case-by-case situations, as it's only one test failing from the whole suite. On the other hand, we have no time right now for that. So let's hint it for now.