Continuous acquisition and HDF5 saving broken

import tango

cam = tango.DeviceProxy("id00/limaccds/samsim")

cam.write_attribute("acq_nb_frames", 0)

cam.write_attribute("saving_directory", "/tmp")
cam.write_attribute("saving_format", "hdf5")
cam.write_attribute("saving_frame_per_file", 10)
cam.write_attribute("saving_mode", "auto_frame")
cam.write_attribute("saving_prefix", "toto")

cam.command_inout("prepareAcq")

leads to

$ LimaCCDs sam_simu
read_shutter_manual_state
[2020/07/28 14:43:41.396545] 7f99f0230740 *Application*Lima.Server.LimaCCDs::LimaCCDs::apply_config-Always: Applied config : /home/debionne/lima_sam_simu.cfg : default

Program terminated with signal SIGFPE, Arithmetic exception.