I'm absolutely sure same skill level programmer will create less defects in Python, Erlang and Lua than in C. You really have to try to overwrite memory in those languages.

Of course you can shoot yourself into foot with stuff like metatables in Lua and Python metaclasses and whatnot. Then again you should see some C macro messes around...

Anyways I don't like when people defend C with that age old argument it requires a clever disciplined programmer that never makes mistakes. Because either such programmers don't exist or they're very rare.