[mcs] Consider method candidates with misplaced named arguments not a…

…pplicable. Fixes #46190

mcs/errors/cs1744-3.cs

@@ -0,0 +1,18 @@
+// CS1744: Named argument `p1' cannot be used for a parameter which has positional argument specified
+// Line: 8
+
+internal class Program
+{
+	public static void Main ()
+	{
+		Method (1, 2, p1: 3);
+	}
+
+	static void Method (int p1, int paramNamed, int p2)
+	{
+	}
+
+	static void Method (int p1, int p2, object paramNamed)
+	{
+	}
+}

mcs/mcs/ecore.cs

@@ -5050,7 +5050,7 @@ int IsApplicable (ResolveContext ec, ref Arguments arguments, int arg_count, ref
 
 								// The slot has been taken by positional argument
 								if (temp != null && !(temp is NamedArgument))
-									break;
+									return NamedArgumentsMismatch - i - 1;
 							}
 
 							if (!arg_moved) {

mcs/tests/test-named-10.cs

@@ -0,0 +1,18 @@
+using System;
+
+internal class Program
+{
+	public static void Main ()
+	{
+		Method (1, 2, paramNamed: 3);
+	}
+
+	static void Method (int p1, int paramNamed, int p2)
+	{
+		throw new ApplicationException ();
+	}
+
+	static void Method (int p1, int p2, object paramNamed)
+	{
+	}
+}

mcs/tests/ver-il-net_4_x.xml

@@ -70068,6 +70068,22 @@
       </method>
     </type>
   </test>
+  <test name="test-named-10.cs">
+    <type name="Program">
+      <method name="Void Main()" attrs="150">
+        <size>15</size>
+      </method>
+      <method name="Void Method(Int32, Int32, Int32)" attrs="145">
+        <size>7</size>
+      </method>
+      <method name="Void Method(Int32, Int32, System.Object)" attrs="145">
+        <size>2</size>
+      </method>
+      <method name="Void .ctor()" attrs="6278">
+        <size>7</size>
+      </method>
+    </type>
+  </test>
   <test name="test-nameof-01.cs">
     <type name="X">
       <method name="Int32 Main()" attrs="150">