Oops, need original bytes here.

headius · headius · commit bc7660b1234c · 2015-03-29T12:52:10.000-05:00
diff --git a/core/src/main/java/org/jruby/util/StringSupport.java b/core/src/main/java/org/jruby/util/StringSupport.java
@@ -911,7 +911,7 @@ public static int rindex(ByteList source, int sourceChars, int subChars, int pos
         }
 
         int s = nth(enc, sourceBytes, sbeg, end, pos);
-        byte[] subBytes = subString.bytes();
+        byte[] subBytes = subString.unsafeBytes();
 
         // switch to byte size here; this is now MRI:str_rindex
         if (subSize == 0) return pos;

Original file line number	Diff line number	Diff line change
`@@ -911,7 +911,7 @@ public static int rindex(ByteList source, int sourceChars, int subChars, int pos`
`911`	`911`	`}`
`912`	`912`
`913`	`913`	`int s = nth(enc, sourceBytes, sbeg, end, pos);`
`914`		`- byte[] subBytes = subString.bytes();`
	`914`	`+ byte[] subBytes = subString.unsafeBytes();`
`915`	`915`
`916`	`916`	`// switch to byte size here; this is now MRI:str_rindex`
`917`	`917`	`if (subSize == 0) return pos;`