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[O] Re: [BUG] Unmatched #+end-src


From: Nicolas Goaziou
Subject: [O] Re: [BUG] Unmatched #+end-src
Date: Thu, 17 Mar 2011 13:09:04 +0100

Hello,

"Eric Schulte" <address@hidden> writes:

>> The real problem is: how should Org react when parsing syntactically
>> erroneous buffers? I concede that freezing Emacs isn't nice, but otoh,
>> code can't deal with every possible user error.
>>
>> So, what is the expected behavior here? Consider orphan #+end_ as
>> normal text, throw an error, or both? An answer to this question would
>> be more useful than code, honestly.
>>
>
> This is just opinion and gut reaction, but my first instinct is to say
> that Org just treat an orphan #+end_ as normal text (or technically as
> an Org-mode comment).
>
> The same is true for a floating #+begin_src.  Until the block is closed,
> it is just a comment.

As it's the only answer so far, I guess it was more trivial than
I thought.

Here is a patch that should fix the original problem.

Martyn, as you are writing tests, would you mind running it against
them, before I apply it?

Many thanks in advance.

Regards,
>From 805e11e419c58a9f3fdb470987056c5ac970817f Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <address@hidden>
Date: Thu, 17 Mar 2011 13:01:06 +0100
Subject: [PATCH] org-list: fix infinite loop on erroneous block and drawer 
constructs

* lisp/org-list.el (org-list-struct,org-in-item-p): don't assume end
  of blocks or drawers necessarily start somewhere. It it isn't the
  case, treat them as normal text.
---
 lisp/org-list.el |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/lisp/org-list.el b/lisp/org-list.el
index aea8634..8bfd359 100644
--- a/lisp/org-list.el
+++ b/lisp/org-list.el
@@ -465,10 +465,10 @@ This checks `org-list-ending-method'."
                     (looking-at org-list-end-re))
                (throw 'exit nil))
               ;; Skip blocks, drawers, inline-tasks, blank lines
-              ((looking-at "^[ \t]*#\\+end_")
-               (re-search-backward "^[ \t]*#\\+begin_" nil t))
-              ((looking-at "^[ \t]*:END:")
-               (re-search-backward org-drawer-regexp nil t)
+              ((and (looking-at "^[ \t]*#\\+end_")
+                    (re-search-backward "^[ \t]*#\\+begin_" lim-up t)))
+              ((and (looking-at "^[ \t]*:END:")
+                    (re-search-backward org-drawer-regexp lim-up t))
                (beginning-of-line))
               ((and inlinetask-re (looking-at inlinetask-re))
                (org-inlinetask-goto-beginning)
@@ -686,10 +686,10 @@ Assume point is at an item."
                             (memq (assq (car beg-cell) itm-lst) itm-lst))))
               ;; Skip blocks, drawers, inline tasks, blank lines
               ;; along the way.
-              ((looking-at "^[ \t]*#\\+end_")
-               (re-search-backward "^[ \t]*#\\+begin_" nil t))
-              ((looking-at "^[ \t]*:END:")
-               (re-search-backward drawers-re nil t)
+              ((and (looking-at "^[ \t]*#\\+end_")
+                    (re-search-backward "^[ \t]*#\\+begin_" lim-up t)))
+              ((and (looking-at "^[ \t]*:END:")
+                    (re-search-backward drawers-re lim-up t))
                (beginning-of-line))
               ((and inlinetask-re (looking-at inlinetask-re))
                (org-inlinetask-goto-beginning)
@@ -753,11 +753,11 @@ Assume point is at an item."
              (throw 'exit (push (cons 0 (point)) end-lst-2)))
             ;; Skip blocks, drawers, inline tasks and blank lines
             ;; along the way
-            ((looking-at "^[ \t]*#\\+begin_")
-             (re-search-forward "^[ \t]*#\\+end_")
+            ((and (looking-at "^[ \t]*#\\+begin_")
+                  (re-search-forward "^[ \t]*#\\+end_" lim-down t))
              (forward-line 1))
-            ((looking-at drawers-re)
-             (re-search-forward "^[ \t]*:END:" nil t)
+            ((and (looking-at drawers-re)
+                  (re-search-forward "^[ \t]*:END:" lim-down t))
              (forward-line 1))
             ((and inlinetask-re (looking-at inlinetask-re))
              (org-inlinetask-goto-end))
-- 
1.7.4.1

-- 
Nicolas Goaziou

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