[Rd] Exit status of Rscript when setting options(error=utils::recover)

[Simon Urbanek]

As Tomas pointed out, it may be helpful to read the R documentation. The error option expects a function, so I suppose you intended something like
options(error=function() {recover(); q(status=1)})
which corresponds to calling dump.frames()

Cheers,
Simon


> On Mar 17, 2019, at 23:44, comic fans <comicfans44 using gmail.com> wrote:
> 
> Thanks for explanation,  so recover in non-interactive session exit
> with 0 is expected behavior .
> dump.frames said that it always write to file (workspace , or specified file).
> I have a R script run as a auto build stage, so I want to print detail
> backtrace to console
> (with source file, line number)  for quickly debug, without saving any dump.
> I tried
> 
> options(error= quote({utils::recover;q(status=1)}))
> 
> it do exit with 1 when script has error, but it only shows a stripped
> call trace like
> 
> Calls: a ... a -> a -> a -> a -> a -> a -> a -> a -> a -> a -> apply
> 
> instead of
> ...
> 99: rec.R#5: a(v, depth - 1)
> 100: rec.R#5: a(v, depth - 1)
> 101: rec.R#5: a(v, depth - 1)
> 102: rec.R#5: a(v, depth - 1)
> 103: rec.R#5: a(v, depth - 1)
> 
> How can I resolve this ? Thanks for advise
> 
> 
> On Fri, Mar 15, 2019 at 10:10 PM Tomas Kalibera
> <tomas.kalibera using gmail.com> wrote:
>> 
>> 
>> Please refer to the documentation (?stop, ?recover, ?dump.frames). In
>> non-interactive use, recover() works as dump.frames(). dump.frames() is
>> documented not to quit R, and the examples show how to quit the R
>> session with a given status automatically after dump.frames(). So in
>> line with the documentation, R continues after the error, it reaches the
>> end of the input, and returns 0.
>> 
>> When you run the example with the NULL default error handler (not
>> setting the error option), the exit status is 1 as documented in ?stop.
>> 
>> To avoid surprise wrt to the exit status or where execution continues,
>> it is best not to set default error handlers in non-interactive use (or
>> set them so that they exit the session with a given exit status).
>> 
>> Tomas
>> 
>> On 3/10/19 4:15 AM, comic fans wrote:
>>> Hello, I've noticed that Rscript didn't exit with error code if I set
>>> options error = utils::recover in .Rprofile . for example
>>> 
>>> Rscript -e "asdf"
>>> 
>>> Error: object 'asdf' not found
>>> No suitable frames for recover()
>>> 
>>> echo $?
>>> 0
>>> 
>>> if didn't set options in .Rprofile, Rscript exit with error code 1, is
>>> this expected behavior ?
>>> 
>>> ______________________________________________
>>> R-devel using r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>> 
>> 
> 
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