From 9a82a8675782f137c8739bc950ac86dfe6a8dfd1 Mon Sep 17 00:00:00 2001
From: Peter Stephenson <pws@zsh.org>
Date: Thu, 23 Jul 2015 09:30:15 +0100
Subject: 35793: avoid undefined behaviour shifting signed number

---
 Src/zsh.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'Src/zsh.h')

diff --git a/Src/zsh.h b/Src/zsh.h
index 69fef33f5..a99c90065 100644
--- a/Src/zsh.h
+++ b/Src/zsh.h
@@ -1752,9 +1752,10 @@ struct tieddata {
 				  * necessarily want to match multiple
 				  * elements
 				  */
-#define SCANPM_ISVAR_AT   ((-1)<<15)	/* "$foo[@]"-style substitution
-					 * Only sign bit is significant
-					 */
+/* "$foo[@]"-style substitution
+ * Only sign bit is significant
+ */
+#define SCANPM_ISVAR_AT   ((int)(((unsigned int)-1)<<15))
 
 /*
  * Flags for doing matches inside parameter substitutions, i.e.
-- 
cgit 1.4.1