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:
>>
>> Debugger entered--Lisp error: (quit)
>>   apply(debug error (quit))
>>   edebug(error (quit))
>>   signal(quit nil)
>>   edebug-signal(quit nil)
>>   xterm--pasted-text()
>>   backtrace-eval((xterm--pasted-text) 0 edebug-after)
>
> Hm.  A surprising thing here is the edebug stuff...  Did you instrument
> the function before running?

Yes, I instrumented it to show where it hangs.