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2011/6/20 Xavier Wang <>:
> But I have some things to do even if I want throw the error, I want to
> execute some code when the function I called have error, even if I don't
> care what error it does , I just want some resource to be clean .

Ah, like this?

local ok, err = pcall(problem_function)
if not ok then

That is, re-raise the error.

steve d.