Add a test for invalid const arguments

Author: varkor

src/test/ui/const-generics/invalid-const-arg-for-type-param.rs

@@ -0,0 +1,9 @@
+use std::convert::TryInto;
+
+struct S;
+
+fn main() {
+    let _: u32 = 5i32.try_into::<32>().unwrap(); //~ ERROR wrong number of const arguments
+    S.f::<0>(); //~ ERROR no method named `f`
+    S::<0>; //~ ERROR  wrong number of const arguments
+}

src/test/ui/const-generics/invalid-const-arg-for-type-param.stderr

@@ -0,0 +1,25 @@
+error[E0107]: wrong number of const arguments: expected 0, found 1
+  --> $DIR/invalid-const-arg-for-type-param.rs:6:34
+   |
+LL |     let _: u32 = 5i32.try_into::<32>().unwrap();
+   |                                  ^^ unexpected const argument
+
+error[E0599]: no method named `f` found for type `S` in the current scope
+  --> $DIR/invalid-const-arg-for-type-param.rs:7:7
+   |
+LL | struct S;
+   | --------- method `f` not found for this
+...
+LL |     S.f::<0>();
+   |       ^
+
+error[E0107]: wrong number of const arguments: expected 0, found 1
+  --> $DIR/invalid-const-arg-for-type-param.rs:8:9
+   |
+LL |     S::<0>;
+   |         ^ unexpected const argument
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0107, E0599.
+For more information about an error, try `rustc --explain E0107`.