From 6bcd363ebf4fc4cde24fd94f48786d4da996e07e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 17 Dec 2008 02:01:37 +0000
Subject: * string.c (rb_str_hash): gets rid of collisions between different  
 encoding strings.  [ruby-core:20526]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20804 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 string.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'string.c')

diff --git a/string.c b/string.c
index f940966753..d34a1e861c 100644
--- a/string.c
+++ b/string.c
@@ -2014,7 +2014,11 @@ rb_memhash(const void *ptr, long len)
 int
 rb_str_hash(VALUE str)
 {
-    return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str));
+    int e = ENCODING_GET(str);
+    if (e) {
+	if (rb_enc_str_asciionly_p(str)) e = 0;
+    }
+    return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str)) ^ e;
 }
 
 int
-- 
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