[O] [BABEL] BUG - error on tangling - disappears when changing the filename

[Rainer M Krug]

Hi

I have a strange error when tangling.

I have a large org file with several code blocks tangling in about
20 R files and one bash file. Usually tangling works perfectly, but
sometimes one code block does not tangle a code block to a file. These
are different blocks. When I change the name of the fiole to be tangled
to, it works again. After d=some time, I can rename it again and it
works again.

The last time it happened, I was debugging the function. But even when
deleting all the content of the code block, the problem persists.

This persists over restarts of org.

The code block looks as follow:

,----
| *** dispProb2D (./R/dispProd2D.R) 
| :PROPERTIES:
| :tangle:   ./R/dispProd2D.R
| :comments: yes
| :no-expand: TRUE
| :END: 
| #+begin_src R
| cat(5)
| #+end_src  
`----

In the original version, there is obviously code in it, but the error
occurs even in the empty block. I just renamed the block, and it is
working again.

Any idea what is causing this?

Please find the backtrace below.

Cheers,

Rainer

,----
| ebugger entered--Lisp error: (wrong-type-argument stringp nil)
|   set-buffer(nil)
|   (save-current-buffer (set-buffer (get-file-buffer file)) (revert-buffer t t 
t))
|   org-babel-find-file-noselect-refresh("./R/dispProd2D.R")
|   (let* ((temp-path file) (visited-p (get-file-buffer temp-path)) temp-result 
temp-file) (org-babel-find-file-noselect-refresh temp-path) (setq temp-file 
(get-file-buffer temp-path)) (save-current-buffer (set-buffer temp-file) (setq 
temp-result (progn (run-hooks (quote org-babel-post-tangle-hook))))) (if 
visited-p nil (kill-buffer temp-file)) temp-result)
|   (lambda (file) (let* ((temp-path file) (visited-p (get-file-buffer 
temp-path)) temp-result temp-file) (org-babel-find-file-noselect-refresh 
temp-path) (setq temp-file (get-file-buffer temp-path)) (save-current-buffer 
(set-buffer temp-file) (setq temp-result (progn (run-hooks (quote 
org-babel-post-tangle-hook))))) (if visited-p nil (kill-buffer temp-file)) 
temp-result))("./R/dispProd2D.R")
|   mapc((lambda (file) (let* ((temp-path file) (visited-p (get-file-buffer 
temp-path)) temp-result temp-file) (org-babel-find-file-noselect-refresh 
temp-path) (setq temp-file (get-file-buffer temp-path)) (save-current-buffer 
(set-buffer temp-file) (setq temp-result (progn (run-hooks (quote 
org-babel-post-tangle-hook))))) (if visited-p nil (kill-buffer temp-file)) 
temp-result)) ("postTangleScript.sh" "./.gitignore" "./DESCRIPTION" 
"./.Rbuildignore" "./R/parmsFire.R" "./R/parmsPinus.R" "./R/parmsAcacia.R" 
"./R/parmsRubus.R" "./R/parmsBudget.R" "./R/parameter.R" "./R/endYear.R" 
"./R/germEst.R" "./R/seedDispersal.R" "./R/seedProduction.R" "./R/fireAliens.R" 
"./R/clearAliens.R" "./R/prioritisation.R" "./R/beginYear.R" "./R/main.R" 
"./R/cumulativeDc.R" "./R/dcToIndLayer.R" "./R/competition.R" 
"./R/dispProd2D.R" "./R/initfun.R" "./R/newInDrak.R" "./R/resetOptions.R" 
"./R/stats.R" "./R/layerIO.R" "./R/layerNames.R" "./R/onLoad.R" "./NAMESPACE" 
"./R/package.R"))
|   (progn (mapc (function (lambda (file) (let* ((temp-path file) (visited-p 
(get-file-buffer temp-path)) temp-result temp-file) 
(org-babel-find-file-noselect-refresh temp-path) (setq temp-file 
(get-file-buffer temp-path)) (save-current-buffer (set-buffer temp-file) (setq 
temp-result (progn ...))) (if visited-p nil (kill-buffer temp-file)) 
temp-result))) (mapcar (function car) path-collector)))
|   (if org-babel-post-tangle-hook (progn (mapc (function (lambda (file) (let* 
((temp-path file) (visited-p ...) temp-result temp-file) 
(org-babel-find-file-noselect-refresh temp-path) (setq temp-file 
(get-file-buffer temp-path)) (save-current-buffer (set-buffer temp-file) (setq 
temp-result ...)) (if visited-p nil (kill-buffer temp-file)) temp-result))) 
(mapcar (function car) path-collector))))
|   (let ((block-counter 0) (org-babel-default-header-args (if target-file 
(org-babel-merge-params org-babel-default-header-args (list (cons :tangle 
target-file))) org-babel-default-header-args)) (tangle-file (if (equal arg 
(quote (16))) (progn (or (cdr (assoc :tangle ...)) (user-error "Point is not in 
a source code block"))))) path-collector) (mapc (function (lambda (by-lang) 
(let* ((lang (car by-lang)) (specs (cdr by-lang)) (ext (or ... lang)) (lang-f 
(intern ...)) she-banged) (mapc (function (lambda ... ...)) specs)))) (if 
(equal arg (quote (4))) (org-babel-tangle-single-block 1 t) 
(org-babel-tangle-collect-blocks lang tangle-file))) (message "Tangled %d code 
block%s from %s" block-counter (if (= block-counter 1) "" "s") 
(file-name-nondirectory (buffer-file-name (or (buffer-base-buffer) 
(current-buffer))))) (if org-babel-post-tangle-hook (progn (mapc (function 
(lambda (file) (let* (... ... temp-result temp-file) 
(org-babel-find-file-noselect-refresh temp-path) (setq temp-file ...) 
(save-current-buffer ... ...) (if visited-p nil ...) temp-result))) (mapcar 
(function car) path-collector)))) (mapc (function (lambda (pair) (if (cdr pair) 
(progn (set-file-modes (car pair) (cdr pair)))))) path-collector) (mapcar 
(function car) path-collector))
|   (save-excursion (let ((block-counter 0) (org-babel-default-header-args (if 
target-file (org-babel-merge-params org-babel-default-header-args (list (cons 
:tangle target-file))) org-babel-default-header-args)) (tangle-file (if (equal 
arg (quote (16))) (progn (or (cdr ...) (user-error "Point is not in a source 
code block"))))) path-collector) (mapc (function (lambda (by-lang) (let* ((lang 
...) (specs ...) (ext ...) (lang-f ...) she-banged) (mapc (function ...) 
specs)))) (if (equal arg (quote (4))) (org-babel-tangle-single-block 1 t) 
(org-babel-tangle-collect-blocks lang tangle-file))) (message "Tangled %d code 
block%s from %s" block-counter (if (= block-counter 1) "" "s") 
(file-name-nondirectory (buffer-file-name (or (buffer-base-buffer) 
(current-buffer))))) (if org-babel-post-tangle-hook (progn (mapc (function 
(lambda (file) (let* ... ... ... ... ... temp-result))) (mapcar (function car) 
path-collector)))) (mapc (function (lambda (pair) (if (cdr pair) (progn 
(set-file-modes ... ...))))) path-collector) (mapcar (function car) 
path-collector)))
|   (save-restriction (if (equal arg (quote (4))) (progn (let ((head 
(org-babel-where-is-src-block-head))) (if head (goto-char head) (user-error 
"Point is not in a source code block"))))) (save-excursion (let ((block-counter 
0) (org-babel-default-header-args (if target-file (org-babel-merge-params 
org-babel-default-header-args (list ...)) org-babel-default-header-args)) 
(tangle-file (if (equal arg (quote ...)) (progn (or ... ...)))) path-collector) 
(mapc (function (lambda (by-lang) (let* (... ... ... ... she-banged) (mapc ... 
specs)))) (if (equal arg (quote (4))) (org-babel-tangle-single-block 1 t) 
(org-babel-tangle-collect-blocks lang tangle-file))) (message "Tangled %d code 
block%s from %s" block-counter (if (= block-counter 1) "" "s") 
(file-name-nondirectory (buffer-file-name (or (buffer-base-buffer) 
(current-buffer))))) (if org-babel-post-tangle-hook (progn (mapc (function 
(lambda ... ...)) (mapcar (function car) path-collector)))) (mapc (function 
(lambda (pair) (if (cdr pair) (progn ...)))) path-collector) (mapcar (function 
car) path-collector))))
|   org-babel-tangle(nil)
|   call-interactively(org-babel-tangle nil nil)
`----


-- 
Rainer M. Krug

email: RMKrug<at>gmail<dot>com

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