Add a test for skipping all arguments versus just one

Author: varkor

src/test/ui/generic/generic-arg-mismatch-recover.rs

@@ -0,0 +1,21 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct Foo<'a, T: 'a>(&'a T);
+
+struct Bar<'a>(&'a ());
+
+fn main() {
+    Foo::<'static, 'static, ()>(&0); //~ ERROR wrong number of lifetime arguments
+    //~^ ERROR mismatched types
+
+    Bar::<'static, 'static, ()>(&()); //~ ERROR wrong number of lifetime arguments
+    //~^ ERROR wrong number of type arguments
+}

src/test/ui/generic/generic-arg-mismatch-recover.stderr

@@ -0,0 +1,31 @@
+error[E0088]: wrong number of lifetime arguments: expected 1, found 2
+  --> $DIR/generic-arg-mismatch-recover.rs:16:20
+   |
+LL |     Foo::<'static, 'static, ()>(&0); //~ ERROR wrong number of lifetime arguments
+   |                    ^^^^^^^ unexpected lifetime argument
+
+error[E0308]: mismatched types
+  --> $DIR/generic-arg-mismatch-recover.rs:16:33
+   |
+LL |     Foo::<'static, 'static, ()>(&0); //~ ERROR wrong number of lifetime arguments
+   |                                 ^^ expected (), found integral variable
+   |
+   = note: expected type `&'static ()`
+              found type `&{integer}`
+
+error[E0088]: wrong number of lifetime arguments: expected 1, found 2
+  --> $DIR/generic-arg-mismatch-recover.rs:19:20
+   |
+LL |     Bar::<'static, 'static, ()>(&()); //~ ERROR wrong number of lifetime arguments
+   |                    ^^^^^^^ unexpected lifetime argument
+
+error[E0087]: wrong number of type arguments: expected 0, found 1
+  --> $DIR/generic-arg-mismatch-recover.rs:19:29
+   |
+LL |     Bar::<'static, 'static, ()>(&()); //~ ERROR wrong number of lifetime arguments
+   |                             ^^ unexpected type argument
+
+error: aborting due to 4 previous errors
+
+Some errors occurred: E0087, E0088, E0308.
+For more information about an error, try `rustc --explain E0087`.