--- old/src/hotspot/share/classfile/compactHashtable.hpp	2018-09-20 11:16:34.500945765 -0700
+++ new/src/hotspot/share/classfile/compactHashtable.hpp	2018-09-20 11:16:34.232935526 -0700
@@ -123,6 +123,15 @@
 
 public:
   void dump(SimpleCompactHashtable *cht, const char* table_name);
+
+  static int default_num_buckets(size_t num_entries) {
+    return default_num_buckets((int)num_entries);
+  }
+  static int default_num_buckets(int num_entries) {
+    int num_buckets = num_entries / SharedSymbolTableBucketSize;
+    // calculation of num_buckets can result in zero buckets, we need at least one
+    return (num_buckets < 1) ? 1 : num_buckets;
+  }
 };
 #endif // INCLUDE_CDS