checker: check error for fn call argument mismatch (fix #14280) (#14283)

vlib/v/checker/check_types.v

@@ -205,30 +205,35 @@ pub fn (mut c Checker) check_expected_call_arg(got ast.Type, expected_ ast.Type,
 			return
 		}
 	}
+	got_typ_sym := c.table.sym(got)
+	got_typ_str := c.table.type_to_str(got.clear_flag(.variadic))
+	expected_typ_sym := c.table.sym(expected_)
+	expected_typ_str := c.table.type_to_str(expected.clear_flag(.variadic))
+
 	if c.check_types(got, expected) {
 		if language != .v || expected.is_ptr() == got.is_ptr() || arg.is_mut
 			|| arg.expr.is_auto_deref_var() || got.has_flag(.shared_f)
 			|| c.table.sym(expected_).kind !in [.array, .map] {
 			return
 		}
-	}
-
-	// Check on Generics types, there are some case where we have the following case
-	// `&Type<int> == &Type<>`. This is a common case we are implementing a function
-	// with generic parameters like `compare(bst Bst<T> node) {}`
-	got_typ_sym := c.table.sym(got)
-	got_typ_str := c.table.type_to_str(got.clear_flag(.variadic))
-	expected_typ_sym := c.table.sym(expected_)
-	expected_typ_str := c.table.type_to_str(expected.clear_flag(.variadic))
-
-	if got_typ_sym.symbol_name_except_generic() == expected_typ_sym.symbol_name_except_generic() {
-		// Check if we are making a comparison between two different types of
-		// the same type like `Type<int> and &Type<>`
-		if (got.is_ptr() != expected.is_ptr()) || !c.check_same_module(got, expected) {
-			return error('cannot use `$got_typ_str` as `$expected_typ_str`')
+	} else {
+		// Check on Generics types, there are some case where we have the following case
+		// `&Type<int> == &Type<>`. This is a common case we are implementing a function
+		// with generic parameters like `compare(bst Bst<T> node) {}`
+		if got_typ_sym.symbol_name_except_generic() == expected_typ_sym.symbol_name_except_generic() {
+			// Check if we are making a comparison between two different types of
+			// the same type like `Type<int> and &Type<>`
+			if (got.is_ptr() != expected.is_ptr()) || !c.check_same_module(got, expected) {
+				return error('cannot use `$got_typ_str` as `$expected_typ_str`')
+			}
+			return
 		}
-		return
+		if got == ast.void_type {
+			return error('`$arg.expr` (no value) used as value')
+		}
+		return error('cannot use `$got_typ_str` as `$expected_typ_str`')
 	}
+
 	if got != ast.void_type {
 		return error('cannot use `$got_typ_str` as `$expected_typ_str`')
 	}

vlib/v/checker/tests/fn_call_arg_mismatch_err_a.out

@@ -1,4 +1,4 @@
-vlib/v/checker/tests/fn_call_arg_mismatch.vv:7:9: error: cannot use `&[]int` as `[]int` in argument 1 to `abc`
+vlib/v/checker/tests/fn_call_arg_mismatch_err_a.vv:7:9: error: cannot use `&[]int` as `[]int` in argument 1 to `abc`
     5 | fn main() {
     6 |     a := [1, 2, 3]
     7 |     go abc(&a)

vlib/v/checker/tests/fn_call_arg_mismatch_err_b.out

@@ -0,0 +1,6 @@
+vlib/v/checker/tests/fn_call_arg_mismatch_err_b.vv:2:6: error: `bar()` (no value) used as value in argument 1 to `foo`
+    1 | fn main() {
+    2 |     foo(bar())
+      |         ~~~~~
+    3 | }
+    4 |

vlib/v/checker/tests/fn_call_arg_mismatch_err_b.vv

@@ -0,0 +1,7 @@
+fn main() {
+	foo(bar())
+}
+
+fn foo(x int) {}
+
+fn bar() {}