bug#24914: 24.5; isearch-regexp: wrong error message

[Drew Adams]

Do this in a large file:

1. C-M-s \(.\|^J\)+

That shows the error message: [error Stack overflow in regexp matcher].
OK, understandable.

2. C-M-s \(.\|^J\)\{,4000\}, where ^J is really a newline char, typed by
using `C-q C-j'.

No problem with that search.

3. C-M-s \(.\|^J\)\{,40000\}

That shows the error message: [incomplete input], which is wrong, IMO.

In GNU Emacs 24.5.1 (i686-pc-mingw32)
 of 2015-04-11 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --prefix=/c/usr --host=i686-pc-mingw32'