* lisp/gnus/gnus-sum.el (gnus-tmp-thread): New var

The recent change to use lexical-binding introduced a bug because
gnus-summary-line-format-alist refers to variable `thread` which is now
lexical and hence not available there any more.  Replace it with
a dynamically scoped var `gnus-tmp-thread` as was already done with
all other vars.

(gnus-summary-line-format-alist): Use it instead of `thread`.
(gnus-summary-prepare-threads): Bind it around call to (eval
gnus-summary-line-format-spec).

diff --git a/lisp/gnus/gnus-sum.el b/lisp/gnus/gnus-sum.el
index f761fdb79453135ef577ca17ba02fe9eba295022..556fb63a07fc90abc95976a9263cb415c994d5c8 100644 (file)
--- a/lisp/gnus/gnus-sum.el
+++ b/lisp/gnus/gnus-sum.el
@@ -50,6 +50,7 @@
 (defvar gnus-tmp-score-char)
 (defvar gnus-tmp-subject)
 (defvar gnus-tmp-subject-or-nil)
+(defvar gnus-tmp-thread)
 (defvar gnus-tmp-unread)
 (defvar gnus-tmp-unread-and-unselected)
 (defvar gnus-tmp-unread-and-unticked)
@@ -1443,15 +1444,17 @@ the normal Gnus MIME machinery."
     (?\< (make-string (max 0 (- 20 gnus-tmp-level)) ? ) ?s)
     (?i gnus-tmp-score ?d)
     (?z gnus-tmp-score-char ?c)
-    (?V (gnus-thread-total-score (and (boundp 'thread) (car thread))) ?d)
+    (?V (gnus-thread-total-score
+         (and (boundp 'gnus-tmp-thread) (car gnus-tmp-thread)))
+        ?d)
     (?U gnus-tmp-unread ?c)
     (?f (gnus-summary-from-or-to-or-newsgroups gnus-tmp-header gnus-tmp-from)
        ?s)
     (?t (gnus-summary-number-of-articles-in-thread
-        (and (boundp 'thread) (car thread)) gnus-tmp-level)
+        (and (boundp 'gnus-tmp-thread) (car gnus-tmp-thread)) gnus-tmp-level)
        ?d)
     (?e (gnus-summary-number-of-articles-in-thread
-        (and (boundp 'thread) (car thread)) gnus-tmp-level t)
+        (and (boundp 'gnus-tmp-thread) (car gnus-tmp-thread)) gnus-tmp-level t)
        ?c)
     (?u gnus-tmp-user-defined ?s)
     (?P (gnus-pick-line-number) ?d)
@@ -3786,9 +3789,9 @@ buffer that was in action when the last article was fetched."
       (setq gnus-tmp-name gnus-tmp-from))
     (unless (numberp gnus-tmp-lines)
       (setq gnus-tmp-lines -1))
-    (if (= gnus-tmp-lines -1)
-       (setq gnus-tmp-lines "?")
-      (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
+    (setq gnus-tmp-lines (if (= gnus-tmp-lines -1)
+                            "?"
+                           (number-to-string gnus-tmp-lines)))
     (condition-case ()
        (put-text-property
         (point)
@@ -5265,7 +5268,7 @@ or a straight list of headers."
        gnus-tmp-header gnus-tmp-unread gnus-tmp-downloaded
        gnus-tmp-replied gnus-tmp-subject-or-nil
        gnus-tmp-dummy gnus-tmp-indentation gnus-tmp-lines gnus-tmp-score
-       gnus-tmp-score-char gnus-tmp-from gnus-tmp-name
+       gnus-tmp-score-char gnus-tmp-from gnus-tmp-name gnus-tmp-thread
        gnus-tmp-number gnus-tmp-opening-bracket gnus-tmp-closing-bracket
        tree-stack)
 
@@ -5516,9 +5519,10 @@ or a straight list of headers."
              (setq gnus-tmp-name gnus-tmp-from))
            (unless (numberp gnus-tmp-lines)
              (setq gnus-tmp-lines -1))
-           (if (= gnus-tmp-lines -1)
-               (setq gnus-tmp-lines "?")
-             (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
+           (setq gnus-tmp-lines (if (= gnus-tmp-lines -1)
+                                    "?"
+                                   (number-to-string gnus-tmp-lines)))
+            (setq gnus-tmp-thread thread)
            (put-text-property
             (point)
             (progn (eval gnus-summary-line-format-spec) (point))