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readline: Add upstream patches. * src/readline-0-001.patch, src/readline-0-002.patch, src/readline-0-003.patch, src/readline-0-004.patch: Add upstream patches (reformatted to apply in MXE): ftp://ftp.gnu.org/pub/gnu/readline/readline-8.0-patches * dist-files.mk: Include new files in list.
author Markus Mützel <markus.muetzel@gmx.de>
date Sun, 28 Jun 2020 15:41:14 +0200
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			   READLINE PATCH REPORT
			   =====================

Readline-Release: 8.0
Patch-ID: readline80-004

Bug-Reported-by:	auroralanes@protonmail.ch
Bug-Reference-ID:	<WikEDKluAyoha9IDLp83rbN7_Uinr2rrpvSV_z4wmt9qur9piN-FNOn17P0cAizEVah1Fvc9d641vIIWX_7SC6EUTz0CatnOH-C-UK3rPYc=@protonmail.ch>
Bug-Reference-URL:	https://lists.gnu.org/archive/html/bug-readline/2020-01/msg00008.html

Bug-Description:

If writing the history file fails, and renaming the backup history file fails,
it's possible for readline's history code to return the wrong error to its
caller.

diff --git "a/histfile.c" "b/histfile.c"
--- a/histfile.c	2019-11-19 10:31:58.000000000 -0500
+++ b/histfile.c	2020-02-01 16:28:29.000000000 -0500
@@ -621,4 +621,5 @@
   if (rv != 0)
     {
+      rv = errno;
       if (tempname)
 	unlink (tempname);
@@ -768,4 +769,5 @@
   if (rv != 0)
     {
+      rv = errno;
       if (tempname)
 	unlink (tempname);
diff --git "a/patchlevel" "b/patchlevel"
--- a/patchlevel	2013-11-15 08:11:11.000000000 -0500
+++ b/patchlevel	2014-03-21 08:28:40.000000000 -0400
@@ -1,3 +1,3 @@
 # Do not edit -- exists only for use by patch
 
-3
+4