Bug#710588: display of search string very wrongly stops when can't find any match

[jidanni]

X-debbugs-Cc: bug-bash@gnu.org
Package: readline-common
Version: 6.2+dfsg-0.1

Do this:
C-r 1 2 3 4 5 6 7 ...

You will see on your screen

(reverse-i-search)`1234':

or you will see more or less digits depending on your history.

The point is sooner or later the digits won't reflect what the actual
current search string is!

There is NO POINT in not showing those digits.

Plus one has to hit Backspace several times until we get back to the
real digits shown.

You are already ringing the bell. The user gets the message.

Go ahead and try the same thing in emacs. Does it act that way? Do you
wish it should act that way?