Fixes CVE-2014-9130
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9130

Upstream source:
https://bitbucket.org/xi/libyaml/commits/2b9156756423e967cfd09a61d125d883fca6f4f2

# HG changeset patch
# User Kirill Simonov <xi@resolvent.net>
# Date 1417197312 21600
# Node ID 2b9156756423e967cfd09a61d125d883fca6f4f2
# Parent  053f53a381ff6adbbc93a31ab7fdee06a16c8a33
Removed invalid simple key assertion (thank to Jonathan Gray).

diff --git a/src/scanner.c b/src/scanner.c
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -1106,13 +1106,6 @@
             && parser->indent == (ptrdiff_t)parser->mark.column);
 
     /*
-     * A simple key is required only when it is the first token in the current
-     * line.  Therefore it is always allowed.  But we add a check anyway.
-     */
-
-    assert(parser->simple_key_allowed || !required);    /* Impossible. */
-
-    /*
      * If the current position may start a simple key, save it.
      */
 
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<tr><td><span title='2019-05-18 18:35:37 +0200'>2019-05-18</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=1d86b05618a063378d7ffc89a9b4c33dd65a760c'>vm: Create installation media with MBR and HFS only, no GPT.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-04-29 21:11:38 +0100'>2019-04-29</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=05344275517e12ea60039272b5d8936d18fd4338'>vm: Pass -smp to QEMU to allow use of multiple cores.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2019-04-25 00:45:35 +0200'>2019-04-25</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=ecb33b87aafd9e240c2cb351525814cb1bb5ceb1'>vm: Adjust FAT serial number code to 32-bit Guile.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-21 00:51:18 +0200'>2019-04-21</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=605815023cd21becc0156916f4ce08950b4459e5'>vm: Use a fixed FAT serial number for 'efi.img' in ISO images.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-21 00:51:18 +0200'>2019-04-21</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=6901b9248ea21f81f033e7b0de32502e389a5b71'>vm: Reset file timestamps of the EFI image in ISO images.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-21 00:51:18 +0200'>2019-04-21</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=833480cc1fa934b64a192fe7b2401491d4f169df'>vm: Reset file timestamps in ISO images.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-14 23:40:53 +0200'>2019-04-14</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=f6e3f0f9b1287eca120517a0161e3d0b1ed6ed44'>vm: Remove Xorriso "-padding" option.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-13 23:12:43 +0100'>2019-03-13</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=59e80445882f8b0379e54916f89510c0deda6698'>Remove traces of "GuixSD".</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-12-19 00:14:00 +0100'>2018-12-19</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=a934e9fc1c798258d344b49631feb23e195e48fa'>vm: Re-enable KVM on i386.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-12-06 17:22:24 +0100'>2018-12-06</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=178be030c0e4fdeac5e1c968b5c99d84bb4691db'>vm: Add padding in the ISO image.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-06 23:21:23 +0100'>2018-11-06</span></td><td><a href='/guix/commit/gnu/build/vm.scm?id=b27ef1d46cfdc3c994b106241f99cd7142083d13'>pack: Import (guix store database) only when '--localstatedir' is passed.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>