Bump corefx

Author: marek-safar

external/corefx

@@ -13,7 +13,7 @@
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/CompilerScope.Storage.cs
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/CompilerScope.cs
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/ILGen.cs
-../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/KeyedQueue.cs
+../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/KeyedStack.cs
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/LabelInfo.cs
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/LambdaCompiler.Address.cs
 ../../../external/corefx/src/System.Linq.Expressions/src/System/Linq/Expressions/Compiler/LambdaCompiler.Binary.cs

mcs/class/System.Core/dynamic_System.Core.dll.sources

@@ -3130,6 +3130,30 @@ public static ReadOnlyCollection<T> AsReadOnly<T> (T[] array)
 			return new ReadOnlyCollection<T> (array);
 		}
 
+		public static void Fill<T> (T[] array, T value)
+		{
+			if (array == null)
+				throw new ArgumentNullException (nameof (array));
+
+			for (int i = 0; i < array.Length; i++)
+				array [i] = value;
+		}
+
+		public static void Fill<T> (T[] array, T value, int startIndex, int count)
+		{
+			if (array == null)
+				throw new ArgumentNullException (nameof (array));
+
+			if (startIndex < 0 || startIndex > array.Length)
+				throw new ArgumentOutOfRangeException (nameof (startIndex));
+
+			if (count < 0 || startIndex > array.Length - count)
+				throw new ArgumentOutOfRangeException (nameof (count));
+
+			for (int i = startIndex; i < startIndex + count; i++)
+				array [i] = value;
+		}
+
 		public static T Find<T> (T [] array, Predicate<T> match)
 		{
 			if (array == null)

mcs/class/corlib/System/Array.cs

@@ -227,6 +227,22 @@ public T Pop() {
             _array[_size] = default(T);     // Free memory quicker.
             return item;
         }
+
+#if MONO
+        public bool TryPop(out T result)
+        {
+            if (_size == 0)
+            {
+                result = default(T);
+                return false;
+            }
+
+            _version++;
+            result = _array[--_size];
+            _array[_size] = default(T);     // Free memory quicker.
+            return true;
+        }
+#endif
 
         // Pushes an item to the top of the stack.
         //