"exceptions.ValueError: Received a NULL pointer."

[d33tah]

Please, fill all relevant items:

• I have read CONTRIBUTING.rst

• I have tried with the latest pre-release version and I still can reproduce the issue.

Tribler version/branch+revision:

✗ git describe
initial_import-11989-g1725b60

Operating system and version:

Fedora release 24

Expected behavior:

Tribler starts

Actual behavior:

Traceback (most recent call last):
  File "/home/d/workspace/0_src/tribler/Tribler/Main/tribler_main.py", line 989, in run
    use_torrent_search=use_torrent_search, use_channel_search=use_channel_search)
  File "/home/d/workspace/0_src/tribler/Tribler/Main/tribler_main.py", line 115, in __init__
    use_torrent_search=use_torrent_search, use_channel_search=use_channel_search)
  File "/home/d/workspace/0_src/tribler/Tribler/Main/tribler_main.py", line 342, in InitStage1
    session = Session(self.sconfig, autoload_discovery=autoload_discovery)
  File "/home/d/workspace/0_src/tribler/Tribler/Core/Session.py", line 124, in __init__
    self.keypair = permidmod.generate_keypair()
  File "/home/d/workspace/0_src/tribler/Tribler/Core/permid.py", line 25, in generate_keypair
    ec_keypair = EC.gen_params(KEYPAIR_ECC_CURVE)
  File "/usr/lib64/python2.7/site-packages/M2Crypto/EC.py", line 269, in gen_params
    return EC(m2.ec_key_new_by_curve_name(curve), 1)
  File "/usr/lib64/python2.7/site-packages/M2Crypto/EC.py", line 106, in __init__
    assert m2.ec_key_type_check(ec), "'ec' type error"
ValueError: Received a NULL pointer.

Steps to reproduce the behavior:

On Fedora 24:

sudo yum install python-qt5 python2-configobj rb_libtorrent-python2
sudo pip install libnacl
./tribler.sh

[devos50]

Thanks for the report! That looks like a M2Crypto issue where the generation of the EC curve goes wrong. We will investigate it.

[devos50]

The default M2Crypto on Fedora does not have support for the specific EC curve we are using (NID_sect233k1). Please see #616 and #893 for more instructions about this. I will close this issue since we have received more reports about this.