[ESS] R hangs with ESS-emacs and options(error=recover)

Yes, ESS is looking for a "> " prompt. recover() is issuing
a "Selection: " which is not the signal that ESS is looking for.

If we made ESS sensitive to "Selection: "
would there be a downside? Could we change the prompt conditional
on something? For example, we could trap the statement in the *R* buffer
options(error=recover)
and set the inferior-ess-primary-prompt to recognize "Selection: ".
When would we set it back?

A better plan for the user, but harder on ESS, would be to monitor
the options()$error

Rich

Hmm, options(error=recover) seems to be working fine for me inside
ESS.

recover() calls the menu() function which requests user input
before dropping into a browser. Although menu appears to be internal
it should be similar to readline. I suspect something else is going
on -- do these functions work for others or am I just lucky ;-)

+ seth

They work for me too.

I do get ESS freezes (that need C-g to interrupt) sometimes, but that
seems unrelated (they are mostly triggered by C-c C-r, but never C-c
C-n).

-Deepayan

Normal use of options(error=recover) has always been OK for me in general, but I do see this behaviour in the following situation: ess-load-file (C-c C-l) hangs if it encounters a parsing problem and options(error=recover) is set.

e.g. contents of file tmp.R:

f <- function() {
if(
6
}
## C-c C-l in tmp.R buffer now results in a hang, requiring C-g before one can get to the R buffer where hitting <return> gets you the "Selection: " prompt [not that that's what you want; you never get the "Errors: Use C-c ` to find error" message, which of course you do get without options(error=recover) ]

Dan


_
platform i686-redhat-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 4.1
year 2006
month 12
day 18
svn rev 40228
language R
version.string R version 2.4.1 (2006-12-18)

Seth> "Richard M. Heiberger" <rmh@temple.edu> writes:
Seth> Hmm, options(error=recover) seems to be working fine for me inside
Seth> ESS.

are you using the unreleased development version of ESS ?

There, we have fixed one of the problems of options(error=recover)

Yes, I know we should release ESS-5.2.4 : The only problem is
that I had promissed to add things there, that haven't been done
yet...

Martin

Seth> recover() calls the menu() function which requests user input
Seth> before dropping into a browser. Although menu appears to be internal
Seth> it should be similar to readline. I suspect something else is going
Seth> on -- do these functions work for others or am I just lucky ;-)

Seth> + seth

Last Changed Rev: 3696
Last Changed Date: 2007-02-11 13:47:10 -0800 (Sun, 11 Feb 2007)

Seth> Martin Maechler <maechler@stat.math.ethz.ch> writes:
>>
Seth> "Richard M. Heiberger" <rmh@temple.edu> writes:
>>
Seth> Hmm, options(error=recover) seems to be working fine for me inside
Seth> ESS.
>>
Seth> Last Changed Rev: 3696
Seth> Last Changed Date: 2007-02-11 13:47:10 -0800 (Sun, 11 Feb 2007)

Ok. Thank you, Seth.
Indeed that explains that you don't have problems.
The following revision was indeed fixing these (problems):

------------------------------------------------------------------------
r3693 | maechler | 2007-01-22 10:49:29 +0100 (Mon, 22 Jan 2007) | 1 line
Changed paths:
M lisp/ChangeLog
M lisp/ess-cust.el
M lisp/ess-inf.el

use try(names(.)) in object completion!
------------------------------------------------------------------------

Regards,
Martin