[Rd] Re: [R] options()$warn==2 and try() (PR#1570)

[Thomas Lumley]

Even try() isn't really involved.

The problem is in src/errors.c:warningcall

It sets a flag inWarning, presumably to ensure that infinite loops of
recursive warnings don't happen, but if options(warn)==2 then an error is
signalled and the flag is not cleared until the next error.

	-thomas


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