fix #25409, error if a generic method argument did not have a corresponding parameter

pkg/analyzer/test/src/task/strong/checker_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // TODO(jmesserly): this file needs to be refactored, it's a port from
 // package:dev_compiler's tests
 /// General type checking tests
 library analyzer.test.src.task.strong.checker_test;
 
 import 'package:unittest/unittest.dart';
@@ skipping 1386 matching lines @@
             /*=B*/ then/*<B>*/(/*=B*/ onValue(A a)) => null;
           }
 
           class DerivedFuture3<T> extends Future<T> {
             /*=S*/ then/*<S>*/(Object onValue(T t)) => null;
           }
 
           class DerivedFuture4<A> extends Future<A> {
             /*=B*/ then/*<B>*/(Object onValue(A a)) => null;
           }
-       '''
+      '''
+  });
+
+  testChecker('generic function wrong number of arguments', {
+      '/main.dart': r'''
+          /*=T*/ foo/*<T>*/(/*=T*/ x, /*=T*/ y) => x;
+          /*=T*/ bar/*<T>*/({/*=T*/ x, /*=T*/ y}) => x;
+
+          main() {
+            // resolving thses shouldn't crash.
+            foo(1, 2, 3);
+            String x = foo('1', '2', '3');
+            foo(1);
+            String x = foo('1');
+            x = /*severe:STATIC_TYPE_ERROR*/foo(1, 2, 3);
+            x = /*severe:STATIC_TYPE_ERROR*/foo(1);
+
+            // named arguments
+            bar(y: 1, x: 2, z: 3);
+            String x = bar(z: '1', x: '2', y: '3');
+            bar(y: 1);
+            x = bar(x: '1', z: 42);
+            x = /*severe:STATIC_TYPE_ERROR*/bar(y: 1, x: 2, z: 3);
+            x = /*severe:STATIC_TYPE_ERROR*/bar(x: 1);
+          }
+      '''
   });
 
   testChecker('unary operators', {
     '/main.dart': '''
       class A {
         A operator ~() {}
         A operator +(int x) {}
         A operator -(int x) {}
         A operator -() {}
       }
@@ skipping 1090 matching lines @@
 
         baz1() sync* { yield* (/*info:DYNAMIC_CAST*/x); }
         Iterable baz2() sync* { yield* (/*info:DYNAMIC_CAST*/x); }
         Iterable<int> baz3() sync* { yield* (/*warning:DOWN_CAST_COMPOSITE*/x); }
         Iterable<int> baz4() sync* { yield* new Iterable<int>(); }
         Iterable<int> baz5() sync* { yield* (/*info:INFERRED_TYPE_ALLOCATION*/new Iterable()); }
     '''
     });
   });
 }