diff -r 1ea46564f04d -r eb74d0175557 jdk/src/java.base/share/classes/java/util/Base64.java
--- a/jdk/src/java.base/share/classes/java/util/Base64.java	Wed Jun 24 18:50:19 2015 +0300
+++ b/jdk/src/java.base/share/classes/java/util/Base64.java	Wed Jun 24 11:15:23 2015 -0700
@@ -737,7 +737,7 @@
             // anything left is invalid, if is not MIME.
             // if MIME, ignore all non-base64 character
             while (sp < sl) {
-                if (isMIME && base64[src[sp++]] < 0)
+                if (isMIME && base64[src[sp++] & 0xff] < 0)
                     continue;
                 throw new IllegalArgumentException(
                     "Input byte array has incorrect ending byte at " + sp);