src/java.base/share/classes/java/util/WeakHashMap.java

imported patch loadFactor-isNaN

*** 209,220 ****
              throw new IllegalArgumentException("Illegal Initial Capacity: "+
                                                 initialCapacity);
          if (initialCapacity > MAXIMUM_CAPACITY)
              initialCapacity = MAXIMUM_CAPACITY;
  
!         if (loadFactor <= 0 || Float.isNaN(loadFactor))
!             throw new IllegalArgumentException("Illegal Load factor: "+
                                                 loadFactor);
          int capacity = 1;
          while (capacity < initialCapacity)
              capacity <<= 1;
          table = newTable(capacity);
--- 209,220 ----
              throw new IllegalArgumentException("Illegal Initial Capacity: "+
                                                 initialCapacity);
          if (initialCapacity > MAXIMUM_CAPACITY)
              initialCapacity = MAXIMUM_CAPACITY;
  
!         if (!(loadFactor > 0))          // also checks for NaNs
!             throw new IllegalArgumentException("Illegal load factor: " +
                                                 loadFactor);
          int capacity = 1;
          while (capacity < initialCapacity)
              capacity <<= 1;
          table = newTable(capacity);