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> > Or simply leave it to the garbage collection. (More often than not there
> > is no hurry to close the file.)
> Hmm, until now it bit me twice not doing so (and doing business in C++
> I tend not to close files opened in function scope, leaving the work
> to the destructor).
> Look at the following simple example:
> [...]

I was talking about read-only streams, which is the case of a file
opened by io.lines.

-- Roberto