[PATCH v2] Fix edge cases with no data being returned and Courier eccentricity.

[Michael Olson <mwolson@gnu.org>]

* lisp/gnus/nnimap.el (nnimap-retrieve-headers-progress): Handle edge
  case where `headers' is nil.  This can occur if the IMAP server does
  not have permissions to read messages from a folder, but can write new
  messages to the folder.
  (nnimap-request-article-part): Do not insert `data' if it is nil.

* lisp/net/imap.el (imap-parse-fetch): Courier can insert spurious blank
  characters which will confuse `read', so skip past them.
---

This applies to Emacs CVS HEAD.

This version backs up one char in order to appease nnimap-forward.

 lisp/gnus/nnimap.el |    9 +++++----
 lisp/net/imap.el    |    4 +++-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lisp/gnus/nnimap.el b/lisp/gnus/nnimap.el
index e0bb5ad..a38d354 100644
--- a/lisp/gnus/nnimap.el
+++ b/lisp/gnus/nnimap.el
@@ -620,7 +620,7 @@ If EXAMINE is non-nil the group is selected read-only."
        ;; to make it more clear.
        (mm-with-unibyte-buffer
 	 (buffer-disable-undo)
-	 (insert headers)
+	 (when headers (insert headers))
 	 (let ((head (nnheader-parse-naked-head uid)))
 	   (mail-header-set-number head uid)
 	   (mail-header-set-chars head chars)
@@ -950,9 +950,10 @@ function is generally only called when Gnus is shutting down."
 	      (erase-buffer)
 	      (let ((data (imap-fetch article part prop nil
 				      nnimap-server-buffer)))
-		(insert (nnimap-demule (if detail
-					   (nth 2 (car data))
-					 data))))
+		(when data
+		  (insert (nnimap-demule (if detail
+					     (nth 2 (car data))
+					   data)))))
 	      (nnheader-ms-strip-cr)
 	      (gnus-message
 	       10 "nnimap: Fetching (part of) article %d from %s...done"
diff --git a/lisp/net/imap.el b/lisp/net/imap.el
index 6726bfd..85afffc 100644
--- a/lisp/net/imap.el
+++ b/lisp/net/imap.el
@@ -2493,7 +2493,9 @@ Return nil if no complete line has arrived."
   (when (eq (char-after) ?\()
     (let (uid flags envelope internaldate rfc822 rfc822header rfc822text
 	      rfc822size body bodydetail bodystructure flags-empty)
-      (while (not (eq (char-after) ?\)))
+      (while (let ((moved (skip-chars-forward " \t")))
+	       (prog1 (not (eq (char-after) ?\)))
+		 (unless (= moved 0) (backward-char))))
 	(imap-forward)
 	(let ((token (read (current-buffer))))
 	  (imap-forward)
-- 
1.5.6.3


-- 
|       Michael Olson  |  FSF Associate Member #652     |
| http://mwolson.org/  |  Hobbies: Lisp, HCoop          |
| Projects: Emacs, Muse, ERC, EMMS, ErBot, DVC, Planner |
`-------------------------------------------------------'