--- a/jaxp/.hgtags	Wed Jul 05 18:15:54 2017 +0200
+++ b/jaxp/.hgtags	Wed Jul 05 18:15:59 2017 +0200
@@ -167,3 +167,4 @@
 eff4ece9c8bc43b3ce2b3758574c4c20147f0689 jdk8-b43
 0b3f3a4ce13930430b32b616a717dfc7fe385b28 jdk8-b44
 57476f66e13c55eea2f2fe2b858369a4c64b9936 jdk8-b45
+300f45e990643af230d6cca39477ff62c44a9a54 jdk8-b46

--- a/jaxp/src/com/sun/org/apache/xerces/internal/impl/XMLEntityManager.java	Wed Jul 05 18:15:54 2017 +0200
+++ b/jaxp/src/com/sun/org/apache/xerces/internal/impl/XMLEntityManager.java	Wed Jul 05 18:15:59 2017 +0200
@@ -2609,6 +2609,18 @@
         if (str == null) {
             return str;
         }
+        int len = str.length(), i=0, ch;
+        for (; i < len; i++) {
+            ch = str.charAt(i);
+            // if it's not an ASCII 7 character, break here, and use UTF-8 encoding
+            if (ch >= 128)
+                break;
+        }
+
+        // we saw no non-ascii-7 character
+        if (i == len) {
+            return str;
+        }
 
         // get UTF-8 bytes for the string
         StringBuffer buffer = new StringBuffer();
@@ -2620,11 +2632,11 @@
             // should never happen
             return str;
         }
-        int len = bytes.length;
-        int ch;
+
+        len = bytes.length;
 
         // for each byte
-        for (int i = 0; i < len; i++) {
+        for (i = 0; i < len; i++) {
             b = bytes[i];
             // for non-ascii character: make it positive, then escape
             if (b < 0) {