Bug#1053341: h5py FTBFS on 32-bit archs: OverflowError: Python int too large to convert to C ssize_t

[Nilesh Patra]

Source: h5py
Version: 3.9.0-2
Severity: serious
X-Debbugs-Cc: dparsons at debian.org

Hi,

The new release of h5py FTBFS on all 32-bit archs.
In particular, it fails its test-suite with:

=================================== FAILURES ===================================
_____________________________ test_register_filter _____________________________

    def test_register_filter():
        filter_id = 256  # Test ID
    
        @H5ZFuncT
        def failing_filter_callback(flags, cd_nelemts, cd_values, nbytes, buf_size, buf):
            return 0
    
        dummy_filter_class = H5ZClass2T(
            version=h5z.CLASS_T_VERS,
            id_=filter_id,
            encoder_present=1,
            decoder_present=1,
            name=b"dummy filter",
            can_apply=None,
            set_local=None,
            filter_=failing_filter_callback,
        )
    
>       h5z.register_filter(addressof(dummy_filter_class))

build/h5py/_debian_h5py_serial/tests/test_h5z.py:65: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
h5py/_debian_h5py_serial/_objects.pyx:54: in h5py._debian_h5py_serial._objects.with_phil.wrapper
    ???
h5py/_debian_h5py_serial/_objects.pyx:55: in h5py._debian_h5py_serial._objects.with_phil.wrapper
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   OverflowError: Python int too large to convert to C ssize_t

h5py/_debian_h5py_serial/h5z.pyx:102: OverflowError

Full log: https://buildd.debian.org/status/fetch.php?pkg=h5py&arch=armel&ver=3.9.0-2&stamp=1696051380&raw=0

-- System Information:
Debian Release: 12.0
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-9-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled