[Python-modules-team] Bug#909986: cloudpickle: FTBFS (TypeError: can't pickle _abc_data objects)

[Santiago Vila]

Package: src:cloudpickle
Version: 0.5.2-2
Severity: serious
Tags: ftbfs

Dear maintainer:

I tried to build this package in buster but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep --with python2,python3 --buildsystem=pybuild
   dh_update_autotools_config -i -O--buildsystem=pybuild
   dh_autoreconf -i -O--buildsystem=pybuild
   dh_auto_configure -i -O--buildsystem=pybuild
I: pybuild base:217: python2.7 setup.py config 
running config
I: pybuild base:217: python3.7 setup.py config 
running config
I: pybuild base:217: python3.6 setup.py config 
running config
   dh_auto_build -i -O--buildsystem=pybuild
I: pybuild base:217: /usr/bin/python setup.py build 
running build

[... snipped ...]

        self.framer.commit_frame()
    
        # Check for persistent id (defined by a subclass)
        pid = self.persistent_id(obj)
        if pid is not None and save_persistent_id:
            self.save_pers(pid)
            return
    
        # Check the memo
        x = self.memo.get(id(obj))
        if x is not None:
            self.write(self.get(x[0]))
            return
    
        # Check the type dispatch table
        t = type(obj)
        f = self.dispatch.get(t)
        if f is not None:
            f(self, obj) # Call unbound method with explicit self
            return
    
        # Check private dispatch table if any, or else copyreg.dispatch_table
        reduce = getattr(self, 'dispatch_table', dispatch_table).get(t)
        if reduce is not None:
            rv = reduce(obj)
        else:
            # Check for a class with a custom metaclass; treat as regular class
            try:
                issc = issubclass(t, type)
            except TypeError: # t is not a class (old Boost; see SF #502085)
                issc = False
            if issc:
                self.save_global(obj)
                return
    
            # Check for a __reduce_ex__ method, fall back to __reduce__
            reduce = getattr(obj, "__reduce_ex__", None)
            if reduce is not None:
>               rv = reduce(self.proto)
E               TypeError: can't pickle _abc_data objects

/usr/lib/python3.7/pickle.py:524: TypeError
=============== 2 failed, 101 passed, 7 skipped in 12.76 seconds ===============
E: pybuild pybuild:338: test: plugin distutils failed with: exit code=1: cd /<<PKGBUILDDIR>>/.pybuild/cpython3_3.7_cloudpickle/build; python3.7 -m pytest -s
dh_auto_test: pybuild --test -i python{version} -p "3.7 3.6" returned exit code 13
make: *** [debian/rules:8: build-indep] Error 25
dpkg-buildpackage: error: debian/rules build-indep subprocess returned exit status 2
--------------------------------------------------------------------------------

The build was made in my autobuilder with "dpkg-buildpackage -A"
but it also fails here:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/cloudpickle.html

where you can get a full build log if you need it.

If this is really a bug in one of the build-depends, please use reassign and affects,
so that this is still visible in the BTS web page for this package.

Thanks.