8184706: Matcher doesn't indicate hitEnd after matching \u0D with \R at EOL

Reviewed-by: sherman

jdk/src/java.base/share/classes/java/util/regex/Pattern.java

@@ -3887,9 +3887,13 @@ loop:   for(int x=0, offset=0; x<nCodePoints; x++, offset+=len) {
                     return next.match(matcher, i + 1, seq);
                 if (ch == 0x0D) {
                     i++;
-                    if (i < matcher.to && seq.charAt(i) == 0x0A &&
-                        next.match(matcher, i + 1, seq)) {
-                        return true;
+                    if (i < matcher.to) {
+                        if (seq.charAt(i) == 0x0A &&
+                            next.match(matcher, i + 1, seq)) {
+                            return true;
+                        }
+                    } else {
+                        matcher.hitEnd = true;
                     }
                     return next.match(matcher, i, seq);
                 }

jdk/test/java/util/regex/RegExTest.java

@@ -33,9 +33,8 @@
  * 6350801 6676425 6878475 6919132 6931676 6948903 6990617 7014645 7039066
  * 7067045 7014640 7189363 8007395 8013252 8013254 8012646 8023647 6559590
  * 8027645 8035076 8039124 8035975 8074678 6854417 8143854 8147531 7071819
- * 8151481 4867170 7080302 6728861 6995635 6736245 4916384
- * 6328855 6192895 6345469 6988218 6693451 7006761 8140212 8143282 8158482
- * 8176029
+ * 8151481 4867170 7080302 6728861 6995635 6736245 4916384 6328855 6192895
+ * 6345469 6988218 6693451 7006761 8140212 8143282 8158482 8176029 8184706
  *
  * @library /test/lib
  * @build jdk.test.lib.RandomFactory
@@ -470,7 +469,25 @@ public class RegExTest {
         m.find();
         if (!m.hitEnd())
             failCount++;
-        report("hitEnd from a Slice");
+
+        // 8184706: Matching u+0d at EOL against \R should hit-end
+        p = Pattern.compile("...\\R");
+        m = p.matcher("cat" + (char)0x0a);
+        m.find();
+        if (m.hitEnd())
+            failCount++;
+
+        m = p.matcher("cat" + (char)0x0d);
+        m.find();
+        if (!m.hitEnd())
+            failCount++;
+
+        m = p.matcher("cat" + (char)0x0d + (char)0x0a);
+        m.find();
+        if (m.hitEnd())
+            failCount++;
+
+        report("hitEnd");
     }
 
     // This is for bug 4997476