[ESS-bugs] ess-mode 5.2.2; tab completion fails under Windows

[Jack Tanner]

Under Windows GNU Emacs + ESS + R 1.9.1, I know that the current
directory contains file foo.R.

  > source('fo<TAB>

should produce

  > source('c:/home/foo.R

but instead produces

  > c:/home/source('fo

Emacs  : GNU Emacs 21.3.1 (i386-msvc-nt5.1.2600)
  of 2003-04-08 on DAVIS
Package: ess-mode 5.2.2

current state:
==============
(setq
  ess-language "S"
  ess-dialect "R"
  ess-ask-for-ess-directory t
  ess-ask-about-transfile nil
  ess-directory nil
  ess-keep-dump-files "always"
  ess-source-directory "/tmp/"
  )
[ess-site.el]: ess-customize-alist=nil
[ess-site.el _2_]: ess-customize-alist=nil
(R): ess-rterm-versions-create making M-x defuns for c:/Program 
Files/R/rw1091/bin/Rterm.exe(ess-setq-vars-LOCAL): language=S, 
dialect=R, buf=nil, comint..echoes=nil, comint..sender=comint-simple-send
(ess-mode-1): ess-language=S, ess-dialect=R buf=masters.R
(ess-mode-1.5): alist=((ess-local-customize-alist quote 
R-customize-alist) (ess-language . S) (ess-dialect . R) (ess-suffix . R) 
(ess-dump-filename-template replace-regexp-in-string S$ ess-suffix 
ess-dump-filename-template-proto) (ess-mode-editing-alist . 
S-editing-alist) (ess-mode-syntax-table . R-syntax-table) 
(ess-help-sec-regex . ess-help-R-sec-regex) (ess-help-sec-keys-alist . 
R-help-sec-keys-alist) (ess-loop-timeout . ess-S-loop-timeout) 
(ess-object-name-db-file . ess-r-namedb.el) (ess-retr-lastvalue-command 
. assign(".Last.value", .ess.lvsave, envir=NULL)
) (ess-save-lastvalue-command . 
assign(".ess.lvsave",.Last.value,inherits=TRUE)
) (ess-imenu-mode-function quote ess-imenu-R) (inferior-ess-program . 
inferior-R-program-name) (inferior-ess-objects-command . objects(pos = %d)
) (inferior-ess-search-list-command . search()
) (inferior-ess-help-command . help("%s", htmlhelp=FALSE)
) (inferior-ess-exit-command . q()) (inferior-ess-exit-prompt . Save 
workspace image? [y/n/c]: ) (inferior-ess-primary-prompt . 
\([A-Z][][A-Za-z0-9.]*\)*> ) (inferior-ess-secondary-prompt . + ?) 
(comint-use-prompt-regexp-instead-of-fields . t) 
(inferior-ess-start-file) (inferior-ess-start-args . ) (ess-STERM . 
iESS) (ess-editor . R-editor) (ess-pager . R-pager) 
(inferior-ess-language-start eval inferior-S-language-start))
(ess-mode-1.6): editing-alist=((paragraph-start concat \s-*$\| 
page-delimiter) (paragraph-separate concat \s-*$\| page-delimiter) 
(paragraph-ignore-fill-prefix . t) (require-final-newline . t) 
(comment-start . #) (comment-start-skip . #+ *) (comment-column . 40) 
(indent-line-function quote S-indent-line) (parse-sexp-ignore-comments . 
t) (ess-set-style . ess-default-style) (ess-local-process-name) 
(ess-mode-syntax-table . S-syntax-table) 
(add-log-current-defun-header-regexp . ^\(.+\)\s-+<-[ 	
]*function) (font-lock-defaults quote (ess-mode-font-lock-keywords nil 
nil ((46 . w)))))
(ess-setq-vars-LOCAL): language=S, dialect=R, buf=nil, 
comint..echoes=nil, comint..sender=comint-simple-send

Finished setting up ESS-mode.

(R): ess-dialect=R, buf=masters.R, start-arg=nil
  current-prefix-arg=nil
(inferior-ess 0): ess-start-args=--ess
ess-setq-vars-default 0: ess-language=Initial, -dialect=nil, buf=nil, 
comint..echoes=nil, comint..sender=comint-simple-send
ess-setq-vars-default 1: ess-language=S, -dialect=R, buf=nil, 
comint..echoes=nil, comint..sender=comint-simple-send
(inf-ess 1): lang=S, dialect=R, tmp-dialect=R, buf=masters.R
(inf-ess 1.1): procname=R temp-dialect=R, buf-name=*R*
(inferior-ess) Method #3 start=m:/COM-PETE/masters/ buf=*R*
(ess-setq-vars-LOCAL): language=S, dialect=R, buf=nil, 
comint..echoes=nil, comint..sender=comint-simple-send
(inf-ess 2.1): ess-language=S, ess-dialect=R buf=*R*
(inf-ess 2.2): start args = --ess , inf-ess-start-args=--ess
(inf-ess finish [S(R), Rterm(nil,nil)]
(ess-multi 0):  inf-ess-start-args=--ess , comint-..echoes=nil
(i-ess 1): buf=*R*, lang=S, comint..echo=nil, 
comint..sender=comint-simple-send,
(i-ess 2): buf=*R*, lang=S, comint..echo=t, 
comint..sender=inferior-R-input-sender,
(ess-setq-vars-LOCAL): language=S, dialect=R, buf=nil, comint..echoes=t, 
comint..sender=inferior-R-input-sender
(i-ess 3): curr-buf=*R*, comint..echo=t, 
comint..sender=inferior-R-input-sender,
(ess-multi post inf-ess: start-args=--ess , comint-echoes=t
(ess-multi 1):  start-args=--ess
Making Process...Buf *R*, Proc R, Prog Rterm
  Start File=nil, Args= --ess .
(R): inferior-ess-language-start=options(STERM='iESS', 
editor='gnuclient.exe')