bug#18727: 25.0.50; Paste to isearch-repeat-forward does not work

[Juri Linkov]

>> 0. Run in a terminal: emacs -Q -nw
>> 1. C-s
>> 2.1. either from the MATE Terminal context menu select "Paste"
>> 2.2. or in xterm click the middle mouse button
>>      (both calls the same command)
>> 3. Emacs hangs and typing 'C-g' produces the backtrace:
>
> Crystal ball says this is because of the xterm paste support.  Can you
> try after disabling that extension?

I don't know how to disable it.  Pasting works fine via ‘xterm-paste’ event and
command with the same name.  But hangs when evaluating ‘(xterm--pasted-text)’.

Since the ‘xterm-paste’ command works without problems, I just copied its body
to ‘isearch-xterm-paste’, and everything works fine with this patch:

diff --git a/lisp/isearch.el b/lisp/isearch.el
index 30f7fc7254..b7fd0b89ae 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -2503,10 +2503,12 @@ isearch-mouse-2
 
 (declare-function xterm--pasted-text "term/xterm" ())
 
-(defun isearch-xterm-paste ()
+(defun isearch-xterm-paste (event)
   "Pull terminal paste into search string."
-  (interactive)
-  (isearch-yank-string (xterm--pasted-text)))
+  (interactive "e")
+  (when (eq (car-safe event) 'xterm-paste)
+    (let ((pasted-text (nth 1 event)))
+      (isearch-yank-string pasted-text))))
 
 (defun isearch-yank-internal (jumpform)
   "Pull the text from point to the point reached by JUMPFORM.