Imported Upstream version 5.18.0.142

Former-commit-id: 7467d4b717762eeaf652d77f1486dd11ffb1ff1f

mcs/errors/cs0280.cs

@@ -0,0 +1,22 @@
+// CS0280: `C.Fixable.GetPinnableReference(int)' has the wrong signature to be used in extensible fixed statement
+// Line: 11
+// Compiler options: -unsafe -langversion:latest -warnaserror
+
+using System;
+
+unsafe class C
+{
+	public static void Main ()
+	{
+		fixed (int* p = new Fixable ()) {
+		}
+	}
+
+	struct Fixable
+	{
+		public ref int GetPinnableReference (int i = 1)
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}

mcs/errors/cs1611-2.cs

@@ -0,0 +1,8 @@
+// CS1611: The params parameter cannot be declared as ref, out or in
+// Line: 6
+// Compiler options: -langversion:latest
+
+class Test
+{
+    public static void Error (params in int args) {}
+}

mcs/errors/cs1644-63.cs

@@ -0,0 +1,22 @@
+// CS1644: Feature `extensible fixed statement' cannot be used because it is not part of the C# 7.2 language specification 
+// Line: 11
+// Compiler options: -unsafe -langversion:7.2
+
+using System;
+
+unsafe class C
+{
+	public static void Main ()
+	{
+		fixed (int* p = new Fixable ()) {
+		}
+	}
+
+	struct Fixable
+	{
+		public ref int GetPinnableReference ()
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}

mcs/errors/cs1644-64.cs

@@ -0,0 +1,13 @@
+// CS1644: Feature `expression body property accessor' cannot be used because it is not part of the C# 6.0 language specification 
+// Line: 11
+// Compiler options: -langversion:6
+
+using System;
+
+class C
+{
+	public int Integer
+	{
+		get => 0;
+	}
+}

mcs/errors/cs1644-65.cs

@@ -0,0 +1,13 @@
+// CS1644: Feature `expression body property accessor' cannot be used because it is not part of the C# 6.0 language specification 
+// Line: 11
+// Compiler options: -langversion:6
+
+using System;
+
+class C
+{
+	public int this[int i]
+	{
+		get => i;
+	}
+}

mcs/errors/cs1644-66.cs

@@ -0,0 +1,17 @@
+// CS1644: Feature `expression body event accessor' cannot be used because it is not part of the C# 6.0 language specification 
+// Line: 11
+// Compiler options: -langversion:6
+
+using System;
+
+class C
+{
+	public event EventHandler Event
+	{
+		add => Ignore ();
+	}
+
+	static void Ignore ()
+	{
+	}
+}

mcs/errors/cs8385-2.cs

@@ -1,4 +1,4 @@
-// CS0428: Cannot convert method group `Main' to non-delegate type `void*'. Consider using parentheses to invoke the method
+// CS8385: The given expression cannot be used in a fixed statement
 // Line: 9
 // Compiler options: -unsafe
 

mcs/errors/cs8385.cs

@@ -1,4 +1,4 @@
-// CS0213: You cannot use the fixed statement to take the address of an already fixed expression
+// CS8385: The given expression cannot be used in a fixed statement
 // Line: 9
 // Compiler options: -unsafe