Test 14study.t fails on Ubuntu 20.04, perl version 5.30, python version 3.8.2: Test 7 got: "1" expected "3"

OS: Ubuntu 20.04
perl version 5.30.0
python version 3.8.2

Commands to reproduce:

$ git clone git@github.com:niner/inline-python-pm.git
$ cd inline-python-pm
$ python --version
Python 3.8.2
$ perl --version
This is perl 5, version 30, subversion 0 (v5.30.0) built for x86_64-linux
$ perl Makefile.PL
Found these python executables on your PATH:
1. /home/hakon/.pyenv/shims/python3
2. /home/hakon/.pyenv/shims/python
3. /bin/python3
Use which? [1] 
Using /home/hakon/.pyenv/shims/python3
Using These Settings:
   Extra Libs:  -lcrypt -lpthread -ldl  -lutil -lm
   Python Lib:  -L/home/hakon/.pyenv/versions/3.8.2-debug/lib/python3.8/config-3.8d-x86_64-linux-gnu -lpython3.8d
   Includes:    -I/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d
   Extra Flags: -DPY_MAJOR_VERSION=3
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Inline::Python
Writing MYMETA.yml and MYMETA.json
$ make
cp Python.pod blib/lib/Inline/Python.pod
cp Python.pm blib/lib/Inline/Python.pm
Running Mkbootstrap for Python ()
chmod 644 "Python.bs"
"/home/hakon/perlbrew/perls/perl-5.30.0/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Python.bs blib/arch/auto/Inline/Python/Python.bs 644
"/home/hakon/perlbrew/perls/perl-5.30.0/bin/perl" "/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/ExtUtils/xsubpp"  -typemap '/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/ExtUtils/typemap'  Python.xs > Python.xsc
mv Python.xsc Python.c
cc -c  -I/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL Python.c
In file included from /home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/Python.h:8,
                 from Python.xs:7:
/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/pyconfig.h:1571: warning: "_GNU_SOURCE" redefined
 1571 | #define _GNU_SOURCE 1
      | 
In file included from /home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/perl.h:28,
                 from Python.xs:4:
/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/config.h:925: note: this is the location of the previous definition
  925 | #   define _GNU_SOURCE
      | 
Python.xs: In function ‘do_pyinit’:
Python.xs:52:5: warning: implicit declaration of function ‘initperl’ [-Wimplicit-function-declaration]
   52 |     initperl();
      |     ^~~~~~~~
cc -c  -I/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL py2pl.c
In file included from /home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/Python.h:8,
                 from py2pl.c:5:
/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/pyconfig.h:1571: warning: "_GNU_SOURCE" redefined
 1571 | #define _GNU_SOURCE 1
      | 
In file included from /home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/perl.h:28,
                 from py2pl.c:2:
/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/config.h:925: note: this is the location of the previous definition
  925 | #   define _GNU_SOURCE
      | 
py2pl.c: In function ‘croak_python_exception’:
py2pl.c:571:36: warning: format ‘%i’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
  571 |             croak("%s: %s at line %i\n", ((PyTypeObject *)ex_type)->tp_name, c_ex_message, PyInt_AsLong(tb_lineno));
      |                                   ~^
      |                                    |
      |                                    int
      |                                   %li
cc -c  -I/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL perlmodule.c
In file included from /home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/Python.h:8,
                 from perlmodule.c:9:
/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/pyconfig.h:1571: warning: "_GNU_SOURCE" redefined
 1571 | #define _GNU_SOURCE 1
      | 
In file included from /home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/perl.h:28,
                 from perlmodule.c:6:
/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/config.h:925: note: this is the location of the previous definition
  925 | #   define _GNU_SOURCE
      | 
cc -c  -I/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL util.c
In file included from /home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/Python.h:8,
                 from util.c:9:
/home/hakon/.pyenv/versions/3.8.2-debug/include/python3.8d/pyconfig.h:1571: warning: "_GNU_SOURCE" redefined
 1571 | #define _GNU_SOURCE 1
      | 
In file included from /home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/perl.h:28,
                 from util.c:6:
/home/hakon/perlbrew/perls/perl-5.30.0/lib/5.30.0/x86_64-linux/CORE/config.h:925: note: this is the location of the previous definition
  925 | #   define _GNU_SOURCE
      | 
rm -f blib/arch/auto/Inline/Python/Python.so
cc  -shared -O2 -L/usr/local/lib -fstack-protector-strong  Python.o py2pl.o perlmodule.o util.o  -o blib/arch/auto/Inline/Python/Python.so  \
   -L/home/hakon/.pyenv/versions/3.8.2-debug/lib/python3.8/config-3.8d-x86_64-linux-gnu -lpython3.8d -lcrypt -lpthread -ldl -lutil -lm   \
  
chmod 755 blib/arch/auto/Inline/Python/Python.so
Manifying 1 pod document

$ make test
"/home/hakon/perlbrew/perls/perl-5.30.0/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Python.bs blib/arch/auto/Inline/Python/Python.bs 644
PERL_DL_NONLAZY=1 "/home/hakon/perlbrew/perls/perl-5.30.0/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/00init.t ................ ok   
t/01testpl.t .............. ok   
t/02testpl.t .............. ok   
t/03parse.t ............... ok   
t/04func.t ................ ok   
t/05JAxH.t ................ ok   
t/06dict.t ................ Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 66) line 1.
 at t/06dict.t line 8.
BEGIN failed--compilation aborted at t/06dict.t line 8.
# Looks like your test exited with 255 before it could output anything.
t/06dict.t ................ Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 6/6 subtests 
t/07nherit.t .............. Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 7) line 1.
 at t/07nherit.t line 4.
BEGIN failed--compilation aborted at t/07nherit.t line 4.
t/07nherit.t .............. Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 5/5 subtests 
t/08ipyobj.t .............. ok   
t/09bind.t ................ ok   
t/10pyeval.t .............. ok   
t/11factor.t .............. ok       
t/12evnodd.t .............. ok       
t/13fibbon.t .............. ok       
t/14study.t ............... 1/14 # Test 7 got: "1" (t/14study.t at line 30)
#   Expected: "3"
#  t/14study.t line 30 is: ok(scalar keys %{$n{classes}}, 3);
# Test 8 got: "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD" (t/14study.t at line 32)
#   Expected: "bone"
#  t/14study.t line 32 is: ok($cls[0], 'bone');
# Test 9 got: <UNDEF> (t/14study.t at line 33)
#   Expected: "comp"
#  t/14study.t line 33 is: ok($cls[1], 'comp');
# Test 10 got: <UNDEF> (t/14study.t at line 34)
#    Expected: "zone"
#  t/14study.t line 34 is: ok($cls[2], 'zone');
# Test 11 got: "0" (t/14study.t at line 37)
#    Expected: "3"
#  t/14study.t line 37 is: ok(scalar @{$n{classes}{comp}}, 3);
# Test 12 got: <UNDEF> (t/14study.t at line 39)
#    Expected: "__init__"
#  t/14study.t line 39 is: ok($fns[0], '__init__');
# Test 13 got: <UNDEF> (t/14study.t at line 40)
#    Expected: "bar"
#  t/14study.t line 40 is: ok($fns[1], 'bar');
# Test 14 got: <UNDEF> (t/14study.t at line 41)
#    Expected: "foo"
#  t/14study.t line 41 is: ok($fns[2], 'foo');
t/14study.t ............... Failed 8/14 subtests 
t/15anon.t ................ ok   
t/16evalpy.t .............. ok     
t/17once.t ................ ok   
t/18newclass.t ............ Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 7) line 1.
 at t/18newclass.t line 4.
BEGIN failed--compilation aborted at t/18newclass.t line 4.
t/18newclass.t ............ Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 5/5 subtests 
t/19testref.t ............. ok     
t/20unicode.t ............. ok   
t/21arrayref.t ............ ok     
t/22int.t ................. ok   
t/23getattr.t ............. ok   
t/24getitem.t ............. ok   
t/25py_sub.t .............. Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 71) line 1.
 at t/25py_sub.t line 5.
BEGIN failed--compilation aborted at t/25py_sub.t line 5.
# Looks like your test exited with 255 before it could output anything.
t/25py_sub.t .............. Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 17/17 subtests 
t/26undef.t ............... ok   
t/27pyattrs.t ............. Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 63) line 1.
 at t/27pyattrs.t line 5.
BEGIN failed--compilation aborted at t/27pyattrs.t line 5.
# Looks like your test exited with 255 before it could output anything.
t/27pyattrs.t ............. Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 14/14 subtests 
t/28exception.t ........... Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 69) line 1.
 at t/28exception.t line 7.
BEGIN failed--compilation aborted at t/28exception.t line 7.
# Looks like your test exited with 255 before it could output anything.
t/28exception.t ........... Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 9/9 subtests 
t/29named_params.t ........ ok   
t/30floats.t .............. ok   
t/31stringification.t ..... Unrecognized character \xDD; marked by <-- HERE after age main::<-- HERE near column 15 at (eval 64) line 1.
 at t/31stringification.t line 7.
BEGIN failed--compilation aborted at t/31stringification.t line 7.
# Looks like your test exited with 255 before it could output anything.
t/31stringification.t ..... Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 3/3 subtests 
t/32boolean.t ............. ok     
t/33reinit.t .............. ok     
t/34env.t ................. ok   
t/35dictunicodememleak.t .. ok   
t/36utfstring.t ........... ok   
t/cmp.t ................... ok   

Test Summary Report
-------------------
t/06dict.t              (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 6 tests but ran 0.
t/07nherit.t            (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 5 tests but ran 0.
t/14study.t             (Wstat: 0 Tests: 14 Failed: 8)
  Failed tests:  7-14
t/18newclass.t          (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 5 tests but ran 0.
t/25py_sub.t            (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 17 tests but ran 0.
t/27pyattrs.t           (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 14 tests but ran 0.
t/28exception.t         (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 9 tests but ran 0.
t/31stringification.t   (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 3 tests but ran 0.
Files=38, Tests=783, 16 wallclock secs ( 0.09 usr  0.02 sys + 14.84 cusr  0.47 csys = 15.42 CPU)
Result: FAIL
Failed 8/38 test programs. 8/783 subtests failed.
make: *** [Makefile:1069: test_dynamic] Error 255

I choose to focus on the first test failure in this issue:

t/14study.t ............... 1/14 # Test 7 got: "1" (t/14study.t at line 30)
#   Expected: "3"
#  t/14study.t line 30 is: ok(scalar keys %{$n{classes}}, 3);

By adding debug print statement in 14study.t I can see that py_study_package on line 16 returns the following hash:

{
    classes     {
        �������������   [
            [0] "__init__",
            [1] "foo",
            [2] "bar"
        ]
    },
    functions   [
        [0] "Foo",
        [1] "bar"
    ]
}

Where the key of the sub hash classes can be printed using printf "%vX\n", $key. This shows that the key contains the bytes:

DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD.DD

This is very odd. Those 0xDD seem to appear in many places in that output (like 06dict.t) but the whole distribution doesn't contain a single one of them:

inline-python-pm (master=)> find . -type f | grep -v '\.git' | xargs hexdump -e '8/1 "%02x_L[red:0xDD] " "\n"' | grep dd

Can you try a different user or machine? Maybe it's something in your environment.

Yes this works fine on a fresh Ubuntu 20.04 VM:

$ git clone https://github.com/niner/inline-python-pm.git
$ cd inline-python-pm
$ perl --version
This is perl 5, version 30, subversion 0 (v5.30.0) built for x86_64-linux-gnu-thread-multi
$ python3 --version
Python 3.8.2
$ sudo apt-get update
$ sudo apt-get install python3-dev cpanminus
$ sudo cpanm --installdeps .
$ sudo cpanm Parse::RecDescent
$ perl Makefile.PL
Found these python executables on your PATH:
1. /usr/bin/python3
2. /usr/bin/python
Using the only python 3 executable I could find even though python 2 was also found
Set the INLINE_PYTHON_EXECUTABLE environment variable to the full path to your python executable to override this selection.
Using /usr/bin/python3
Using These Settings:
   Extra Libs:  -lcrypt -lpthread -ldl  -lutil -lm
   Python Lib:  -L/usr/lib/python3.8/config-3.8-x86_64-linux-gnu -lpython3.8
   Includes:    -I/usr/include/python3.8
   Extra Flags: -DPY_MAJOR_VERSION=3
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Inline::Python
Writing MYMETA.yml and MYMETA.json
$ make
cp Python.pm blib/lib/Inline/Python.pm
cp Python.pod blib/lib/Inline/Python.pod
Running Mkbootstrap for Python ()
chmod 644 "Python.bs"
"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Python.bs blib/arch/auto/Inline/Python/Python.bs 644
"/usr/bin/perl" "/usr/share/perl/5.30/ExtUtils/xsubpp"  -typemap '/usr/share/perl/5.30/ExtUtils/typemap'  Python.xs > Python.xsc
mv Python.xsc Python.c
x86_64-linux-gnu-gcc -c  -I/usr/include/python3.8 -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.30/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL Python.c
Python.xs: In function ‘do_pyinit’:
Python.xs:52:5: warning: implicit declaration of function ‘initperl’ [-Wimplicit-function-declaration]
   52 |     initperl();
      |     ^~~~~~~~
x86_64-linux-gnu-gcc -c  -I/usr/include/python3.8 -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.30/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL py2pl.c
py2pl.c: In function ‘croak_python_exception’:
py2pl.c:571:36: warning: format ‘%i’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
  571 |             croak("%s: %s at line %i\n", ((PyTypeObject *)ex_type)->tp_name, c_ex_message, PyInt_AsLong(tb_lineno));
      |                                   ~^
      |                                    |
      |                                    int
      |                                   %li
x86_64-linux-gnu-gcc -c  -I/usr/include/python3.8 -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.30/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL perlmodule.c
x86_64-linux-gnu-gcc -c  -I/usr/include/python3.8 -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g   -DVERSION=\"0.56\" -DXS_VERSION=\"0.56\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.30/CORE"  -DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL util.c
rm -f blib/arch/auto/Inline/Python/Python.so
LD_RUN_PATH="/usr/lib/python3.8/config-3.8-x86_64-linux-gnu" x86_64-linux-gnu-gcc  -shared -L/usr/local/lib -fstack-protector-strong  Python.o py2pl.o perlmodule.o util.o  -o blib/arch/auto/Inline/Python/Python.so  \
   -L/usr/lib/python3.8/config-3.8-x86_64-linux-gnu -lpython3.8 -lcrypt -lpthread -ldl -lutil -lm   \
  
chmod 755 blib/arch/auto/Inline/Python/Python.so
Manifying 1 pod document
$ make test
"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Python.bs blib/arch/auto/Inline/Python/Python.bs 644
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/00init.t ................ ok   
t/01testpl.t .............. ok   
t/02testpl.t .............. ok   
t/03parse.t ............... ok   
t/04func.t ................ ok   
t/05JAxH.t ................ ok   
t/06dict.t ................ ok   
t/07nherit.t .............. ok   
t/08ipyobj.t .............. ok   
t/09bind.t ................ ok   
t/10pyeval.t .............. ok   
t/11factor.t .............. ok       
t/12evnodd.t .............. ok       
t/13fibbon.t .............. ok       
t/14study.t ............... ok     
t/15anon.t ................ ok   
t/16evalpy.t .............. ok     
t/17once.t ................ ok   
t/18newclass.t ............ ok   
t/19testref.t ............. ok     
t/20unicode.t ............. ok   
t/21arrayref.t ............ ok     
t/22int.t ................. ok   
t/23getattr.t ............. ok   
t/24getitem.t ............. ok   
t/25py_sub.t .............. ok     
t/26undef.t ............... ok   
t/27pyattrs.t ............. ok     
t/28exception.t ........... ok   
t/29named_params.t ........ ok   
t/30floats.t .............. ok   
t/31stringification.t ..... ok   
t/32boolean.t ............. ok     
t/33reinit.t .............. ok     
t/34env.t ................. ok   
t/35dictunicodememleak.t .. ok   
t/36utfstring.t ........... ok   
t/cmp.t ................... ok   
All tests successful.
Files=38, Tests=842,  7 wallclock secs ( 0.10 usr  0.04 sys +  6.43 cusr  0.47 csys =  7.04 CPU)
Result: PASS

Ok, then it really is no issue with Inline::Python but some weirdness in the environment that manages to mightily confuse Perl. Closing.

Hi. I investigated this a little bit more. I think it could be related to that I use pyenv. It seems that the problem is that the generated shared object Python.so is linked statically with libpython3.9d.a instead of dynamically with libpython3.9d.so when I use the pyenv python. I notice from the output of make that
if I use the pyenv installed Python 3.9.3, Python.so is generated by the command:

cc  -shared -O2 -L/usr/local/lib -fstack-protector-strong  Python.o py2pl.o perlmodule.o util.o  \
   -o blib/arch/auto/Inline/Python/Python.so   \
   -L/home/hakon/.pyenv/versions/3.9.3-debug/lib/python3.9/config-3.9d-x86_64-linux-gnu \
   -lpython3.9d -lcrypt -lpthread -ldl -lutil -lm

If I instead use the system python 3.9.4, Python.so is generated using:

LD_RUN_PATH="/usr/lib/python3.9/config-3.9-x86_64-linux-gnu" cc  -shared -O2 -L/usr/local/lib \
   -fstack-protector-strong  Python.o py2pl.o perlmodule.o util.o  -o blib/arch/auto/Inline/Python/Python.so  \
   -L/usr/lib/python3.9/config-3.9-x86_64-linux-gnu -lpython3.9 -lcrypt -lpthread -ldl -lutil -lm

Now, there is an interesting difference in the above to library paths:

-L/home/hakon/.pyenv/versions/3.9.3-debug/lib/python3.9/config-3.9d-x86_64-linux-gnu, and
-L/usr/lib/python3.9/config-3.9-x86_64-linux-gnu

In the first case there is no shared object libpython3.9d.so in the given path, but for the second case (the system python), there is a shared object /usr/lib/python3.9/config-3.9-x86_64-linux-gnu/libpython3.9.so in the path.

I think that in the first case, since the .so is missing, the cc command is using the static library /home/hakon/.pyenv/versions/3.9.3-debug/lib/python3.9/config-3.9d-x86_64-linux-gnu/libpython3.9d.a instead.

I checked Makefile.PL, and I see that on line 154 it is using the config variable LIBPL to locate the directory of libpython.so. However, there is another config variable called LIBDIR, see this Q&A, which works correctly for me. Compare
for the pyenv python:

$ python3 -c "from distutils import sysconfig; print('LIBDIR={}'.format(sysconfig.get_config_var('LIBDIR'))); print('LIBPL={}'.format(sysconfig.get_config_var('LIBPL')))"
LIBDIR=/home/hakon/.pyenv/versions/3.9.3-debug/lib
LIBPL=/home/hakon/.pyenv/versions/3.9.3-debug/lib/python3.9/config-3.9d-x86_64-linux-gnu

and for the system python:

$ python3 -c "from distutils import sysconfig; print('LIBDIR={}'.format(sysconfig.get_config_var('LIBDIR'))); print('LIBPL={}'.format(sysconfig.get_config_var('LIBPL')))"
LIBDIR=/usr/lib/x86_64-linux-gnu
LIBPL=/usr/lib/python3.9/config-3.9-x86_64-linux-gnu

In both cases above, the shared object exists in LIBDIR. Maybe Makefile.PL needs to be patched to use LIBDIR instead of LIBPL ?

Fixup in Makefile.PL

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Test 14study.t fails on Ubuntu 20.04, perl version 5.30, python version 3.8.2: Test 7 got: "1" expected "3" #29

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Test 14study.t fails on Ubuntu 20.04, perl version 5.30, python version 3.8.2: Test 7 got: "1" expected "3" #29

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niner commented on Jan 8, 2021

hakonhagland commented on Jan 8, 2021

niner commented on Jan 8, 2021

hakonhagland commented on May 27, 2021

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