[ESS] ess-tracebug behavior [probably wishlist]
ross at biostat.ucsf.edu
Sat May 4 03:38:02 CEST 2013
On 4/24/2013 1:21 PM, Vitalie Spinu wrote:
> Hi Ross,
> Dev ESS has now true toggleble breakpoints that you can
> activate/deactivate during the debug session without the need of
> re-sourcing. Toggling is bound to C-c C-t o.
> I have also much improved the ess-dbg-flag-for-debugging. It sees all
> the functions from the current context, and all the internal functions
> in the namespaces of the packages listed in ess-developer-packages. So,
> if you are on SVN or git please test the stuff out. I would be happy to
> hear your comments.
I am now using the latest git: 650a142597a3be857407e180381acf617f333676.
C-c C-t d to debug a function. It was exported from a package, and did
appear on the autocompletion list.
I did enter the debugger when I hit it, though no special code display.
The status area of emacs listed a bunch of keys like (M)-N for next. I
hit Esc-n and got an error"M-n is undefined". If I enter the R window
I can debug in the usual R way. Apparently Esc-N (uppercase) works;
having to hit the shift key for a basic debugging operation is awkward.
I wanted to trace into a function that had not been exported. C-c C-t d
did have it on the completion list--impressive. However, although it
told me it had set debugging, I did not actually get a debugger on it.
I typed n in the debugger prompt and it simply returned
(mice.impute.2lmixed.logit was the inner function I was trying to debug):
debug: type <- c(2, type)
debug: if (any(type == 1)) return(mice.impute.2lmixed.logit(y, ry, x,
Browse> any(type==1) # set debug on mice.impute.2lmixed.logit here
debug: return(mice.impute.2lmixed.logit(y, ry, x, type))
I tried using debugonce() from the command line in the debugger; it too was ineffective.
I verified that when I'm at top level the non-exported function is not in the completion list of functions to debug.
After using ess-developer on the package (C-c C-t a mice) the private
function is part of the completion list for C-c C-t d at the top level.
I thought the first time I tried this it did not stop, but when I try to
reproduce it's OK. However, the completion lists the function twice,
once as mice.impute2l.mixed.logit and once as
C-c C-t D did not remove the debugging from the function. Actually, I'm
not sure the uppercase D is getting through; when it was echoing I only
saw a lower case d, and the status message is "flagged for debugging"
after I select the function.
Some possible extensions
C-c C-t D (unflag for debugging) lists all functions; it would be nice
if it only listed ones actually flagged for debugging. BTW, is typing
undebug(foo) equivalent to C-c C-t D foo?
C-u C-t d does debugonce.
For the record:
options(deparse.max.lines) limits the stack trace (an R, not ESS,
feature). It's only partly effective, limiting the stack trace but not
the function body dump as you enter the browser.
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