RedisAI crashes on MODELSCAN & SCRIPTSCAN

[hhsecond]

The latest push to master introduce a regression that causes RedisAI to crash when doing MODELSCAN. Interestingly, if the MODELSET is tagged, it doesn't crash. I haven't looked into the core for the exact crash issue yet but made a script to reproduce if anybody else has time (run it from the root of redisai-py to match the relative path to the provided model)

from ml2rt import load_model
from redisai import Client

con = Client()

model_path = 'test/testdata/'
ptmodel = load_model(model_path + "pt-minimal.pt")


def core_dump_when_not_tagged():
    con.modelset("pt_model", 'torch', 'cpu', ptmodel)
    con.modelscan()


def no_core_dump_when_tagged():
    con.modelset("pt_model", 'torch', 'cpu', ptmodel, tag='v1.0')
    con.modelscan()


if __name__ == "__main__":
    no_core_dump_when_tagged()
    core_dump_when_not_tagged()

Crash on SCRIPTSCAN is also easy to reproduce