Without dev-python/pycrypto tribler doesn't start. Log ~/.Tribler/tribler.log: ERROR 1410783750.94 optional_crypto:8 Using fallback for gmpy, not recommended as it hurts performance and is less tested Traceback (most recent call last): File "Tribler/Main/tribler.py", line 28, in <module> run() File "Tribler/Main/tribler.py", line 24, in run from Tribler.Main.tribler_main import run as run_main File "/usr/share/tribler/Tribler/Main/tribler_main.py", line 64, in <module> from Tribler.Main.vwxGUI.MainFrame import FileDropTarget File "/usr/share/tribler/Tribler/Main/vwxGUI/MainFrame.py", line 60, in <module> from Tribler.Main.vwxGUI.home import Home, Stats, NetworkGraphPanel File "/usr/share/tribler/Tribler/Main/vwxGUI/home.py", line 7, in <module> from Tribler.community.tunnel.community import TunnelCommunity File "/usr/share/tribler/Tribler/community/tunnel/community.py", line 11, in <module> from Crypto.Util.number import bytes_to_long, long_to_bytes ImportError: No module named Crypto.Util.number Reproducible: Always Steps to Reproduce: 1. Install tribler on a system without pycrypto 2. Try starting tribler Actual Results: Tribler doesn't start Expected Results: Tribler should start Installing dev-python/pycrypto solves this problem
*** This bug has been marked as a duplicate of bug 522862 ***