[ESS] options(error=recover) produces ESS freeze

[James W. MacDonald]

Peter Meilstrup wrote:
> I keep reproducing a very simple recipe for making ESS and the entire 
> Emacs process freeze:
> 
> 1. set options(error=recover)
> 2. Move to a buffer where there is a group of statements, one of which 
> will produce an error. For example:
> 
> options(error=recover)
> library(datasets)
> avg <- by(warpbreaks, list(warpbreaks$wool, warpbreaks$tnsion), 
> function(x)mean(x$breaks)))
> #previous line generates error due to typo
> print(avg)
> 
> 3. use C-p or C-r etc. to evaluate the paragraph.
> 4. RESULT: emacs becomes completely unresponsive.
> 
> This makes ESS darn near unusable for me. This can't be normal, can it?

This works fine for me using R-2.10.0, emacs 22.3.1 and ess 5.6 (svn 
checkout) on Windows or R-2.10.0, emacs 23.1.2 and ess 5.4 on Linux

 > options(error=recover)
 > library(datasets)
 > avg <- by(warpbreaks, list(warpbreaks$wool, warpbreaks$tnsion),
+ function(x)mean(x$breaks)))
Error: unexpected ')' in:
"avg <- by(warpbreaks, list(warpbreaks$wool, warpbreaks$tnsion),
function(x)mean(x$breaks)))"
No suitable frames for recover()
 > #previous line generates error due to typo
 > print(avg)
Error in print(avg) : object 'avg' not found

Enter a frame number, or 0 to exit

1: print(avg)

Selection: 0
 >

So I don't think it is necessarily an emacs/ess problem.

Best,

Jim



> 
> I'm using ESS 5.5 with R 2.10.0 on both emacs 22.1.1 (OS X built in) and 
> Aquamacs (22.3.1).
> 
> Can anyone shed light?
> 
> Peter
> 
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-- 
James W. MacDonald, M.S.
Biostatistician
Douglas Lab
University of Michigan
Department of Human Genetics
5912 Buhl
1241 E. Catherine St.
Ann Arbor MI 48109-5618
734-615-7826