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Release notes for 13.1, 12.5, 11.10, 10.15, 9.6.20, 9.5.24.

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<!-- doc/src/sgml/release-9.6.sgml --> <!-- doc/src/sgml/release-9.6.sgml -->
<!-- See header comment in release.sgml about typical markup --> <!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-6-20">
<title>Release 9.6.20</title>
<formalpara>
<title>Release date:</title>
<para>2020-11-12</para>
</formalpara>
<para>
This release contains a variety of fixes from 9.6.19.
For information about new features in the 9.6 major release, see
<xref linkend="release-9-6">.
</para>
<sect2>
<title>Migration to Version 9.6.20</title>
<para>
A dump/restore is not required for those running 9.6.X.
</para>
<para>
However, if you are upgrading from a version earlier than 9.6.16,
see <xref linkend="release-9-6-16">.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master [566372b3d] 2020-08-15 10:15:53 -0700
Branch: REL_13_STABLE Release: REL_13_0 [592a589a0] 2020-08-15 10:15:56 -0700
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<para>
Prevent possible data loss from concurrent truncations of SLRU logs
(Noah Misch)
</para>
<para>
This rare problem would manifest in later <quote>apparent
wraparound</quote> or <quote>could not access status of
transaction</quote> errors.
</para>
</listitem>
<listitem>
<!--
Author: Thomas Munro <tmunro@postgresql.org>
Branch: master [aca74843e] 2020-09-24 10:39:52 +1200
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<para>
Ensure that SLRU directories are properly fsync'd during checkpoints
(Thomas Munro)
</para>
<para>
This prevents possible data loss in a subsequent operating system
crash.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [d907bd054] 2020-11-03 15:41:32 -0500
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<para>
Fix <command>ALTER ROLE</command> for users with
the <literal>BYPASSRLS</literal> attribute (Tom Lane, Stephen Frost)
</para>
<para>
The <literal>BYPASSRLS</literal> attribute is only allowed to be
changed by superusers, but other <command>ALTER ROLE</command>
operations, such as password changes, should be allowed with only
ordinary permission checks. The previous coding erroneously
restricted all changes on such a role to superusers.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [502898192] 2020-08-21 15:00:47 -0400
Branch: REL_13_STABLE Release: REL_13_0 [894f5dea7] 2020-08-21 15:00:48 -0400
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Branch: master [19f5a37b9] 2020-09-13 12:51:21 -0400
Branch: REL_13_STABLE Release: REL_13_0 [b380484a8] 2020-09-13 12:51:21 -0400
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<para>
Fix handling of expressions in <command>CREATE TABLE LIKE</command>
with inheritance (Tom Lane)
</para>
<para>
If a <command>CREATE TABLE</command> command uses
both <literal>LIKE</literal> and traditional inheritance, column
references in <literal>CHECK</literal> constraints and expression
indexes that came from a <literal>LIKE</literal> parent table tended
to get mis-numbered, resulting in wrong answers and/or bizarre error
messages. The same could happen in <literal>GENERATED</literal>
expressions, in branches that have that feature.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [489c9c340] 2020-09-30 15:40:23 -0400
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<para>
Fix off-by-one conversion of negative years to BC dates
in <function>to_date()</function>
and <function>to_timestamp()</function> (Dar Alathar-Yemen, Tom Lane)
</para>
<para>
Also, arrange for the combination of a negative year and an
explicit <quote>BC</quote> marker to cancel out and produce AD.
</para>
</listitem>
<listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [fd26f7823] 2020-09-29 16:21:46 +0900
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<para>
Ensure that standby servers will archive WAL timeline history files
when <varname>archive_mode</varname> is set
to <literal>always</literal> (Grigory Smolkin, Fujii Masao)
</para>
<para>
This oversight could lead to failure of subsequent PITR recovery
attempts.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [0038f9438] 2020-08-14 13:26:57 -0400
Branch: REL_13_STABLE Release: REL_13_0 [1c6066fbd] 2020-08-14 13:26:57 -0400
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<para>
During <quote>smart</quote> shutdown, don't terminate background
processes until all client (foreground) sessions are done (Tom Lane)
</para>
<para>
The previous behavior broke parallel query processing, since the
postmaster would terminate parallel workers and refuse to launch any
new ones. It also caused autovacuum to cease functioning, which
could have dire long-term effects if the surviving client sessions
make a lot of data changes.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master Release: REL_13_BR [9abb2bfc0] 2019-10-13 15:48:26 -0400
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<para>
Avoid recursive consumption of stack space while processing signals
in the postmaster (Tom Lane)
</para>
<para>
Heavy use of parallel processing has been observed to cause
postmaster crashes due to too many concurrent signals requesting
creation of a parallel worker process.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [bedadc732] 2020-09-09 15:32:45 -0400
Branch: REL_13_STABLE Release: REL_13_0 [35e59398a] 2020-09-09 15:32:34 -0400
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Branch: master [58c6feccf] 2020-09-10 12:06:37 -0400
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<para>
Avoid running <systemitem>atexit</systemitem> handlers when exiting
due to SIGQUIT (Kyotaro Horiguchi, Tom Lane)
</para>
<para>
Most server processes followed this practice already, but the
archiver process was overlooked. Backends that were still waiting
for a client startup packet got it wrong, too.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [4d346def1] 2020-08-22 14:46:40 -0400
Branch: REL_13_STABLE Release: REL_13_0 [de627adaa] 2020-08-22 14:46:40 -0400
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<para>
Avoid misoptimization of subquery qualifications that reference
apparently-constant grouping columns (Tom Lane)
</para>
<para>
A <quote>constant</quote> subquery output column isn't really
constant if it is a grouping column that appears in only some of the
grouping sets.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [1e7629d2c] 2020-08-14 22:14:03 -0400
Branch: REL_13_STABLE Release: REL_13_0 [b538e83f1] 2020-08-14 22:14:03 -0400
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<para>
Avoid failure when SQL function inlining changes the shape of a
potentially-hashable subplan comparison expression (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [a811ea5bd] 2020-08-13 17:33:49 -0400
Branch: REL_13_STABLE Release: REL_13_0 [2f29fd4cb] 2020-08-13 17:33:49 -0400
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Branch: master [6e70443ed] 2020-08-17 16:20:06 -0400
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<para>
While building or re-building an index, tolerate the appearance of
new HOT chains due to concurrent updates
(Anastasia Lubennikova, &Aacute;lvaro Herrera)
</para>
<para>
This oversight could lead to <quote>failed to find parent tuple for
heap-only tuple</quote> errors.
</para>
</listitem>
<listitem>
<!--
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Branch: master [7577dd848] 2020-11-07 00:39:19 +0100
Branch: REL_13_STABLE [6a7b55f37] 2020-11-07 00:40:06 +0100
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<para>
Ensure that data is detoasted before being inserted into a BRIN
index (Tomas Vondra)
</para>
<para>
Index entries are not supposed to contain out-of-line TOAST
pointers, but BRIN didn't get that memo. This could lead to errors
like <quote>missing chunk number 0 for toast value NNN</quote>.
(If you are faced with such an error from an existing
index, <command>REINDEX</command> should be enough to fix it.)
</para>
</listitem>
<listitem>
<!--
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [1f42d35a1] 2020-08-12 15:33:36 -0400
Branch: REL_13_STABLE Release: REL_13_0 [8782ea2f3] 2020-08-12 15:33:36 -0400
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<para>
Handle concurrent desummarization correctly during BRIN index scans
(Alexander Lakhin, &Aacute;lvaro Herrera)
</para>
<para>
Previously, if a page range was desummarized at just the wrong time,
an index scan might falsely raise an error indicating index
corruption.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [10564ee02] 2020-08-27 17:36:13 -0400
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<para>
Fix rare <quote>lost saved point in index</quote> errors in scans of
multicolumn GIN indexes (Tom Lane)
</para>
</listitem>
<listitem>
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Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Branch: master [ced138e8c] 2020-09-15 21:03:14 -0300
Branch: REL_13_STABLE Release: REL_13_0 [873cb8fca] 2020-09-15 21:03:14 -0300
Author: Tom Lane <tgl@sss.pgh.pa.us>
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<para>
Fix use-after-free hazard when an event trigger monitors
an <command>ALTER TABLE</command> operation (Jehan-Guillaume de
Rorthais)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [19ad7e1d7] 2020-09-06 12:55:13 -0400
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<para>
Fix incorrect error message about inconsistent moving-aggregate
data types (Jeff Janes)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [be4b0c007] 2020-09-03 16:52:09 -0400
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<para>
Avoid lockup when a parallel worker reports a very long error
message (Vignesh C)
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter@eisentraut.org>
Branch: REL_13_STABLE [1f53d0b9f] 2020-10-20 14:09:16 +0200
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<para>
Avoid unnecessary failure when transferring very large payloads
through shared memory queues (Markus Wanner)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [e55f718fc] 2020-09-26 16:04:06 -0400
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<para>
Fix relation cache memory leaks with RLS policies (Tom Lane)
</para>
</listitem>
<listitem>
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Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [397ea901e] 2020-10-12 13:31:24 -0400
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Branch: REL_10_STABLE [a5c77e6b8] 2020-10-12 13:31:24 -0400
Branch: REL9_6_STABLE [c7573ab1e] 2020-10-12 13:31:24 -0400
Branch: REL9_5_STABLE [43ca5e07d] 2020-10-12 13:31:24 -0400
-->
<para>
Fix small memory leak when SIGHUP processing decides that a new GUC
variable value cannot be applied without a restart (Tom Lane)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b55b4dad9] 2020-09-01 13:14:44 -0400
Branch: REL_13_STABLE Release: REL_13_0 [4178b7499] 2020-09-01 13:14:44 -0400
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Branch: REL9_5_STABLE [8d486cfbf] 2020-09-01 13:14:44 -0400
Branch: master [4d41823c5] 2020-09-04 21:01:58 -0400
Branch: REL_13_STABLE Release: REL_13_0 [8df601bd4] 2020-09-04 21:01:59 -0400
Branch: REL_12_STABLE [fc37c6f61] 2020-09-04 21:01:59 -0400
Branch: REL_11_STABLE [d7ae549e3] 2020-09-04 21:01:59 -0400
Branch: REL_10_STABLE [546479f34] 2020-09-04 21:01:59 -0400
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<para>
Make <application>libpq</application> support arbitrary-length lines
in <filename>.pgpass</filename> files (Tom Lane)
</para>
<para>
This is mostly useful to allow using very long security tokens as
passwords.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [7d00a6b2d] 2020-10-17 16:53:48 -0400
Branch: REL_13_STABLE [d2074daeb] 2020-10-19 11:23:51 -0400
Branch: REL_12_STABLE [407580aab] 2020-10-19 11:23:51 -0400
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-->
<para>
In <application>libpq</application> for Windows,
call <function>WSAStartup()</function> once per process
and <function>WSACleanup()</function> not at all (Tom Lane,
Alexander Lakhin)
</para>
<para>
Previously, <application>libpq</application>
invoked <function>WSAStartup()</function> at connection start
and <function>WSACleanup()</function> at connection cleanup.
However, it appears that calling <function>WSACleanup()</function>
can interfere with other program operations; notably, we have
observed rare failures to emit expected output to stdout. There
appear to be no ill effects from omitting the call, so do that.
(This also eliminates a performance issue from repeated DLL loads and
unloads when a program performs a series of database connections.)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [21d36747d] 2020-10-24 13:12:08 -0400
Branch: REL_13_STABLE [fd048e0cb] 2020-10-24 13:12:19 -0400
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-->
<para>
Fix <application>ecpg</application> library's per-thread
initialization logic for Windows (Tom Lane, Alexander Lakhin)
</para>
<para>
Multi-threaded <application>ecpg</application> applications could
suffer rare misbehavior due to incorrect locking.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [66f8687a8] 2020-10-28 14:35:53 -0400
Branch: REL_13_STABLE [ba4f5413e] 2020-10-28 14:35:53 -0400
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-->
<para>
On Windows, make <application>psql</application> read the output of
a backtick command in text mode, not binary mode (Tom Lane)
</para>
<para>
This ensures proper handling of newlines.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a45bc8a4f] 2020-09-24 18:19:38 -0400
Branch: REL_13_STABLE [cb8885ac4] 2020-09-24 18:19:38 -0400
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Branch: REL_10_STABLE [1888ff8d0] 2020-09-24 18:19:39 -0400
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Branch: REL9_5_STABLE [56b46d3a1] 2020-09-24 18:19:39 -0400
Branch: master [8e5793ab6] 2020-10-19 19:03:46 -0400
Branch: REL_13_STABLE [1814f915b] 2020-10-19 19:03:46 -0400
Branch: REL_12_STABLE [c6d0b9b16] 2020-10-19 19:03:46 -0400
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Branch: REL9_5_STABLE [da129a04a] 2020-10-19 19:03:47 -0400
-->
<para>
Fix usage of complex connection-string parameters
in <application>pg_dump</application>,
<application>pg_restore</application>,
<application>clusterdb</application>,
<application>reindexdb</application>,
and <application>vacuumdb</application> (Tom Lane)
</para>
<para>
The <option>-d</option> parameter
of <application>pg_dump</application>
and <application>pg_restore</application>, or
the <option>--maintenance-db</option> parameter of the other
programs mentioned, can be a <quote>connection string</quote>
containing multiple connection parameters rather than just a
database name. In cases where these programs need to initiate
additional connections, such as parallel processing or processing of
multiple databases, the connection string was forgotten and just the
basic connection parameters (database name, host, port, and
username) were used for the additional connections. This could lead
to connection failures if the connection string included any other
essential information, such as non-default SSL or GSS parameters.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [85c54287a] 2020-10-21 16:19:00 -0400
Branch: REL_13_STABLE [2e4af4110] 2020-10-21 16:19:00 -0400
Branch: REL_12_STABLE [f656517ec] 2020-10-21 16:19:01 -0400
Branch: REL_11_STABLE [20be76d5c] 2020-10-21 16:19:01 -0400
Branch: REL_10_STABLE [8175da6e7] 2020-10-21 16:19:02 -0400
Branch: REL9_6_STABLE [870a23230] 2020-10-21 16:18:41 -0400
Branch: REL9_5_STABLE [6997da09a] 2020-10-21 16:18:41 -0400
-->
<para>
When <application>psql</application>'s <command>\connect</command>
command re-uses connection parameters, ensure that all
non-overridden parameters from a previous connection string are
re-used (Tom Lane)
</para>
<para>
This avoids cases where reconnection might fail due to omission of
relevant parameters, such as non-default SSL or GSS options. This
is largely the same problem as just cited
for <application>pg_dump</application> et al,
although <application>psql</application>'s behavior is more complex
since the user may intentionally override some connection
parameters.
</para>
</listitem>
<listitem>
<!--
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [3eb3d3e78] 2020-09-04 13:54:54 -0400
Branch: REL_13_STABLE Release: REL_13_0 [72857482c] 2020-09-04 13:55:11 -0400
Branch: REL_12_STABLE [616110eac] 2020-09-04 13:55:03 -0400
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [9e5f1f21a] 2020-10-07 12:51:02 -0400
Branch: REL_13_STABLE [2ea624b4b] 2020-10-07 12:51:03 -0400
Branch: REL_12_STABLE [d8c2a2199] 2020-10-07 12:51:04 -0400
Branch: REL_11_STABLE [f2c6e94f0] 2020-10-07 12:51:05 -0400
Branch: REL_10_STABLE [0c79dcb36] 2020-10-07 12:51:05 -0400
Branch: REL9_6_STABLE [710c0a66d] 2020-10-07 12:51:06 -0400
Branch: REL9_5_STABLE [0bfe356c5] 2020-10-07 12:51:06 -0400
-->
<para>
Ensure that <application>pg_dump</application> collects per-column
information about extension configuration tables (Fabr&iacute;zio de
Royes Mello, Tom Lane)
</para>
<para>
Failure to do this led to crashes when
specifying <option>--inserts</option>, or underspecified (though
usually correct) <command>COPY</command> commands when
using <command>COPY</command> to reload the tables' data.
</para>
</listitem>
<listitem>
<!--
Author: Bruce Momjian <bruce@momjian.us>
Branch: master [3c0471b5f] 2020-10-15 19:33:46 -0400
Branch: REL_13_STABLE [59cfff65b] 2020-10-15 19:33:45 -0400
Branch: REL_12_STABLE [a106236d8] 2020-10-15 19:33:43 -0400
Branch: REL_11_STABLE [eb421c83b] 2020-10-15 19:33:42 -0400
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Branch: REL9_5_STABLE [d9ae2297b] 2020-10-15 19:33:36 -0400
Branch: master [536de14e2] 2020-10-15 20:37:20 -0400
Branch: REL_13_STABLE [79fe23465] 2020-10-15 20:37:20 -0400
Branch: REL_12_STABLE [0ab7ca98a] 2020-10-15 20:37:20 -0400
Branch: REL_11_STABLE [16be4e435] 2020-10-15 20:37:19 -0400
Branch: REL_10_STABLE [6e34cc8ab] 2020-10-15 20:37:19 -0400
Branch: REL9_6_STABLE [9dcffe69a] 2020-10-15 20:37:19 -0400
Branch: REL9_5_STABLE [b05672c72] 2020-10-15 20:37:19 -0400
-->
<para>
Make <application>pg_upgrade</application> check for pre-existence
of tablespace directories in the target cluster (Bruce Momjian)
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [ca2a12c93] 2020-10-19 09:36:56 +0900
Branch: REL_13_STABLE [1bd9b2b23] 2020-10-19 09:37:50 +0900
Branch: REL_12_STABLE [57bdf29dd] 2020-10-19 09:37:55 +0900
Branch: REL_11_STABLE [914139081] 2020-10-19 09:38:01 +0900
Branch: REL_10_STABLE [e8d36f9ec] 2020-10-19 09:38:06 +0900
Branch: REL9_6_STABLE [994a02f7f] 2020-10-19 09:38:13 +0900
Branch: REL9_5_STABLE [099238322] 2020-10-19 09:38:18 +0900
-->
<para>
Fix potential memory leak in <filename>contrib/pgcrypto</filename>
(Michael Paquier)
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [02a75f836] 2020-10-16 11:59:13 -0400
Branch: REL_13_STABLE [3d338a46a] 2020-10-16 11:59:25 -0400
Branch: REL_12_STABLE [7004ce758] 2020-10-16 11:59:31 -0400
Branch: REL_11_STABLE [1eb2d7e3e] 2020-10-16 11:59:36 -0400
Branch: REL_10_STABLE [3e1a4c260] 2020-10-16 11:59:41 -0400
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Branch: REL9_5_STABLE [9c3032881] 2020-10-16 11:59:52 -0400
-->
<para>
Add check for an unlikely failure case
in <filename>contrib/pgcrypto</filename> (Daniel Gustafsson)
</para>
</listitem>
<listitem>
<!--
Author: Peter Eisentraut <peter@eisentraut.org>
Branch: REL9_6_STABLE [27acbd51e] 2020-09-08 10:09:43 +0200
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<para>
Use <literal>return</literal> not <literal>exit()</literal> in
<application>configure</application>'s
test programs (Peter Eisentraut)
</para>
<para>
This avoids failures with pickier compilers.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [c4a803ac7] 2020-10-16 21:53:33 -0400
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Branch: master [7d6d6bce4] 2020-10-22 21:23:47 -0400
Branch: REL_13_STABLE [96ed2ae93] 2020-10-22 21:24:01 -0400
Branch: REL_12_STABLE [78ccf7f42] 2020-10-22 21:24:07 -0400
Branch: REL_11_STABLE [02f86d523] 2020-10-22 21:24:12 -0400
Branch: REL_10_STABLE [a357cc05d] 2020-10-22 21:24:17 -0400
Branch: REL9_6_STABLE [05a36321a] 2020-10-22 21:24:23 -0400
Branch: REL9_5_STABLE [0abebb58f] 2020-10-22 21:24:28 -0400
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<para>
Update time zone data files to <application>tzdata</application>
release 2020d for DST law changes in Fiji, Morocco, Palestine, the
Canadian Yukon, Macquarie Island, and Casey Station (Antarctica);
plus historical corrections for France, Hungary, Monaco, and
Palestine.
</para>
</listitem>
<listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [ce0e97f80] 2020-10-16 21:40:16 -0400
Branch: REL_13_STABLE [e0cf5e9b2] 2020-10-16 21:40:16 -0400
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Branch: REL9_5_STABLE [38fac9c1f] 2020-10-16 21:40:16 -0400
Branch: master [c5054da0d] 2020-10-22 21:15:22 -0400
Branch: REL_13_STABLE [0e551533b] 2020-10-22 21:15:37 -0400
Branch: REL_12_STABLE [f56c42e50] 2020-10-22 21:16:04 -0400
Branch: REL_11_STABLE [d2ffe0a00] 2020-10-22 21:16:16 -0400
Branch: REL_10_STABLE [34285083b] 2020-10-22 21:16:23 -0400
Branch: REL9_6_STABLE [58f9f52a3] 2020-10-22 21:16:31 -0400
Branch: REL9_5_STABLE [ff26f804a] 2020-10-22 21:16:38 -0400
-->
<para>
Sync our copy of the timezone library with IANA tzcode release 2020d
(Tom Lane)
</para>
<para>
This absorbs upstream's change of <application>zic</application>'s
default output option from <quote>fat</quote>
to <quote>slim</quote>. That's just cosmetic for our purposes, as
we continue to select the <quote>fat</quote> mode in pre-v13
branches. This change also ensures
that <function>strftime()</function> does not
change <varname>errno</varname> unless it fails.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-6-19"> <sect1 id="release-9-6-19">
<title>Release 9.6.19</title> <title>Release 9.6.19</title>