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>If I start my lua script using lua_pcall() I can set an error handler and
>that way get stack dumps etc instead of just the error message itself.
>However, if I use coroutines and therefore start the scripts using
>lua_resume I do not have this possibility in the call.
>So how do I set an error handler when using lua_resume?  Especially as I
>can't do it through another pcall inside the script either.

Start your interaction with Lua with lua_cpcall, as lua.c does.