Fix CVE-2014-2524:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2524
http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00057.html

Patch copied from:
https://ftp.gnu.org/gnu/readline/readline-6.3-patches/readline63-003

			   READLINE PATCH REPORT
			   =====================

Readline-Release: 6.3
Patch-ID: readline63-003

Bug-Reported-by:
Bug-Reference-ID:
Bug-Reference-URL:

Bug-Description:

There are debugging functions in the readline release that are theoretically
exploitable as security problems.  They are not public functions, but have
global linkage.

Patch (apply with `patch -p0'):

*** ../readline-6.3/util.c	2013-09-02 13:36:12.000000000 -0400
--- util.c	2014-03-20 10:25:53.000000000 -0400
***************
*** 477,480 ****
--- 479,483 ----
  }
  
+ #if defined (DEBUG)
  #if defined (USE_VARARGS)
  static FILE *_rl_tracefp;
***************
*** 539,542 ****
--- 542,546 ----
  }
  #endif
+ #endif /* DEBUG */
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<tr><td><span title='2023-04-27 22:19:10 +0300'>2023-04-27</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=b8b3af93da5340eecab77fa7b12c7ce364bf11cf'>gnu: ncdu-1: Update to 1.18.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-1): Update to 1.18.1.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-02-09 21:58:18 +0200'>2023-02-09</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=66a6c516e2b774805c2c583766d8231f6b58e028'>gnu: ncdu: Update to 2.2.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu): Update to 2.2.2.
[native-inputs]: Switch from zig-0.9 to zig-0.10.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-02-09 21:58:17 +0200'>2023-02-09</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=85b065c6fce7c1e9a6c2cd24392b8113a4a66903'>gnu: zig: Update to 0.10.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/zig.scm (zig-0.10): New variable.
(zig-0.9): Rename from zig. Inherit from zig-0.10.
(zig): Define as zig-0.10.
* gnu/packages/ncdu.scm (ncdu)[native-inputs]: Use zig-0.9.
* gnu/packages/zig-xyz.scm (zig-zls)[inputs]: Use zig-0.9.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-12-11 01:00:05 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=d0d06d81682ed88e4ba59b02cedbf52f58af8155'>gnu: ncdu: Use upstream name.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-1): New variable, renamed from…
(ncdu): …this one, itself renamed from the old ncdu-2.  Simple!
[name]: Drop suffix.
[properties]: Remove obsolete 'upstream-name.
(ncdu-2): Redefine as a DEPRECATED-PACKAGE alias of ncdu.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-11 01:00:04 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=7951892d39211aaeccefeab9a5971ec08572cce8'>gnu: ncdu2: Delete pregenerated man page from source.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu2)[source]: Add a snippet.
[arguments]: Adjust 'build-manpage phase accordingly.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-11 01:00:04 +0100'>2022-12-11</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=a4e98faa1e852c0e25bddd915a7dd8c8bed26a04'>gnu: ncdu2: Do not use the illegal instructions.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2)[arguments]: Compile for a baseline CPU.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-12-15 17:11:35 +0200'>2022-12-15</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=b19f5bbac79522438bb9deca8bbb28fc0f751903'>gnu: ncdu: Update to 1.18.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu): Update to 1.18.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-11-01 19:03:31 +0200'>2022-11-01</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=088962f3c29d958809f47fec81bb01aaf4592b8c'>gnu: ncdu-2: Update to 2.2.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2): Update to 2.2.1.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-10-18 09:22:39 +0300'>2022-10-18</span></td><td><a href='/guix/commit/gnu/packages/ncdu.scm?id=054ddcbbc6a5465a56c84414ef49389487f7ef6d'>gnu: ncdu-2: Update to 2.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ncdu.scm (ncdu-2): Update to 2.2.
</span></span></td><td>Efraim Flashner</td></tr>