From 31d67bd35362c1ab570caccedfec3e24257b55c5 Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@php.net>
Date: Mon, 20 Jan 2014 08:38:53 +0100
Subject: [PATCH] Fixed Bug #66412 readline_clear_history() with libedit causes
 segfault after #65714

Checking all libedit functions, this check is done in each functions (add_history,
read_history, write_history, ...) but is missing in clear_history.

Test coverage: readline_clear_history_001.phpt
---
 NEWS                    | 4 ++++
 ext/readline/readline.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/NEWS b/NEWS
index ce2d100799f..f03180d8593 100644
--- a/NEWS
+++ b/NEWS
@@ -17,6 +17,10 @@ PHP                                                                        NEWS
   . Fixed bug #66298 (ext/opcache/Optimizer/zend_optimizer.c has dos-style 
     ^M as lineend). (Laruence)
 
+- Readline
+  . Fixed Bug #66412 (readline_clear_history() with libedit causes segfault after
+    #65714). (Remi)
+
 - Session
   . Fixed bug #66469 (Session module is sending multiple set-cookie headers when
     session.use_strict_mode=1) (Yasuo)
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index ecd55333504..4bd91034629 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -354,6 +354,11 @@ PHP_FUNCTION(readline_clear_history)
 		return;
 	}
 
+#if HAVE_LIBEDIT
+	/* clear_history is the only function where rl_initialize
+	   is not call to ensure correct allocation */
+	using_history();
+#endif
 	clear_history();
 
 	RETURN_TRUE;