--- old/src/java.base/share/classes/java/util/concurrent/atomic/LongAccumulator.java	2021-01-09 11:35:46.349013077 -0800
+++ new/src/java.base/share/classes/java/util/concurrent/atomic/LongAccumulator.java	2021-01-09 11:35:46.061015342 -0800
@@ -108,14 +108,15 @@
         if ((cs = cells) != null
             || ((r = function.applyAsLong(b = base, x)) != b
                 && !casBase(b, r))) {
+            int index = getProbe();
             boolean uncontended = true;
             if (cs == null
                 || (m = cs.length - 1) < 0
-                || (c = cs[getProbe() & m]) == null
+                || (c = cs[index & m]) == null
                 || !(uncontended =
                      (r = function.applyAsLong(v = c.value, x)) == v
                      || c.cas(v, r)))
-                longAccumulate(x, function, uncontended);
+                longAccumulate(x, function, uncontended, index);
         }
     }