Add tests

src/test/ui/typeck/check-args-on-fn-err-2.rs

@@ -0,0 +1,5 @@
+fn main() {
+    a((), 1i32 == 2u32);
+    //~^ ERROR cannot find function `a` in this scope
+    //~| ERROR mismatched types
+}

src/test/ui/typeck/check-args-on-fn-err-2.stderr

@@ -0,0 +1,23 @@
+error[E0308]: mismatched types
+  --> $DIR/check-args-on-fn-err-2.rs:2:19
+   |
+LL |     a((), 1i32 == 2u32);
+   |           ----    ^^^^ expected `i32`, found `u32`
+   |           |
+   |           expected because this is `i32`
+   |
+help: change the type of the numeric literal from `u32` to `i32`
+   |
+LL |     a((), 1i32 == 2i32);
+   |                    ~~~
+
+error[E0425]: cannot find function `a` in this scope
+  --> $DIR/check-args-on-fn-err-2.rs:2:5
+   |
+LL |     a((), 1i32 == 2u32);
+   |     ^ not found in this scope
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0308, E0425.
+For more information about an error, try `rustc --explain E0308`.

src/test/ui/typeck/check-args-on-fn-err.rs

@@ -0,0 +1,6 @@
+fn main() {
+    unknown(1, |glyf| {
+        //~^ ERROR: cannot find function `unknown` in this scope
+        let actual = glyf;
+    });
+}

src/test/ui/typeck/check-args-on-fn-err.stderr

@@ -0,0 +1,9 @@
+error[E0425]: cannot find function `unknown` in this scope
+  --> $DIR/check-args-on-fn-err.rs:2:5
+   |
+LL |     unknown(1, |glyf| {
+   |     ^^^^^^^ not found in this scope
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0425`.