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swankr: Bug list

#1 printed output not redirected to slime repl

The output from functions performing printing is sent to the standard output of the process running swank(), not to an emacs stream.

#2 popping beyond inspector history crashes

Inspecting something and hitting l causes the R debugger to pop up from trying to send NULL in a sexp to Emacs.

#3 source reference in compile-string-for-emacs

It would be good if we could associate the expressions in the string with a reference to the corresponding source. Unfortunately, emacs only passes the buffer position in bytes (or maybe characters), whereas R’s srcrefs work with lines and columns.

#4 multibyte characters corrupt slime connection

Not in all circumstances (e.g. =”£”= is OK) but 1:£ fails in slime-net-read-or-lose.

#5 respect visibility of evaluated results

I think we can do this by calling .Internal(eval.with.vis(...)) instead of just regular eval()

#6 occasional invalid sink() errors

Not sure yet when it happens, but it makes the terminal browser pop up.

#7 swank server is uninterruptible

at least in certain conditions

#8 startup is not filesystem-location independent

Requires the cwd to be the swankr directory to be able to find swank-presentations and swank-media

#9 help and ? to produce help buffers

Not like ESS, though: that works by looking at the user’s input with a regexp. Use slime-media?

#10 0 or more than 1 exprs at REPL

Entering 0 exprs (whitespace or the empty string) at the REPL gives an error from `swank:listener-eval`, which subscripts the parse tree with index 1. (Entering more than one simply ignores all after the first, assuming that they all parse). We should be a bit more like R’s repl, evaluating each of the exprs in turn and treating the results a bit like CL’s multiple values

#11 no newline when using :popup-buffer for ?help

Logged here so that I don’t forget it if I sort out #9 first: we need to be able to indicate “no repl result please” if we open a new temporary buffer to display the result.

#12 escaping when searching for completions

Gets thoroughly confused on completing “read.” because the “.” is treated as a regexp “any character” pattern.

#13 source location in sldb wrong

I think there’s an off-by-one in the association between frames and srcrefs. Test case is something like 1+”foo” at the repl, and then hitting “v” on the `swank:listener-eval` frame. Also the arglists seem weird to me; in a call like frob(foo), I would expect to see the value of foo in the locals.

#14 thread argument to emacsRex unused

This is a problem not least because it causes all sorts of problems in inspecting swank-internal frames in sldb; test case is 1+”foo”, then RET on the eval(expr, envir, enclos) frame just below `swank:listener-eval`.

#15 write and use Rd2org instead of Rd2txt

org-mode is the future!

#16 ESS configuration

sorting out the function regexp at least, but generally reducing dependence might be good.

#17 encoding / external-format confusion

We declare ourselves capable of handling utf-8-unix encoding, but whether we actually do anything close to being correct is unclear. (Almost certainly not; I suspect we naïvely use nchar() in places). We could either declare our encoding as latin1-unix, or make the server utf8ly correct. To reproduce, simply type “ë” at the repl.

#18 ess-help needs to be loaded automatically

to reproduce: in a fresh emacs, type ?help

#19 base graphics don’t work automatically

They can be made to by passing –interactive to R on startup, but I’m not sure what else that does.

#20 closing the connection causes infinite R errors

reported by “Philipp Marek” <> by private mail.

#21 inspecting an environment causes error in match()

reported by “Philipp Marek” <> by private mail.

To reproduce, C-c I globalenv() RET, or hit RET on environment presentations in the debugger (if presentations are on).

#22 completion of named list fields

It is very nice in ESS to be able to type df$ TAB and get a completion list of the data frame’s columns. Supporting it in swankr should be really easy.


Local Variables: mode: org; End:

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