checker: check generic method call args mismatch (#10669)

vlib/os/file_test.v

@@ -306,15 +306,15 @@ fn test_read_raw_at() ? {
 	f.write_raw(another_permission) ?
 	f.close()
 	f = os.open_file(tfile, 'r') ?
-	mut at := 3
+	mut at := u64(3)
 	p := f.read_raw_at<Point>(at) ?
-	at += int(sizeof(Point))
+	at += sizeof(Point)
 	b := f.read_raw_at<byte>(at) ?
-	at += int(sizeof(byte))
+	at += sizeof(byte)
 	c := f.read_raw_at<Color>(at) ?
-	at += int(sizeof(Color))
+	at += sizeof(Color)
 	x := f.read_raw_at<Permissions>(at) ?
-	at += int(sizeof(Permissions))
+	at += sizeof(Permissions)
 	f.close()
 
 	assert p == another_point

vlib/v/checker/checker.v

@@ -2038,7 +2038,7 @@ pub fn (mut c Checker) method_call(mut call_expr ast.CallExpr) ast.Type {
 				}
 				continue
 			}
-			if method.generic_names.len > 0 {
+			if exp_arg_typ.has_flag(.generic) {
 				continue
 			}
 			c.check_expected_call_arg(got_arg_typ, c.unwrap_generic(exp_arg_typ), call_expr.language) or {

vlib/v/checker/tests/generics_fn_called_multi_args_mismatch.out

@@ -3,5 +3,12 @@ vlib/v/checker/tests/generics_fn_called_multi_args_mismatch.vv:3:13: error: cann
     2 |     x := 'ab'.runes()[..1]
     3 |     foo_str(1, x)
       |                ^
-    4 | }
-    5 |
+    4 |
+    5 |     foo := Foo<int>{}
+vlib/v/checker/tests/generics_fn_called_multi_args_mismatch.vv:6:11: error: cannot use `[]rune` as `string` in argument 1 to `Foo<int>.info`
+    4 |
+    5 |     foo := Foo<int>{}
+    6 |     foo.info(x)
+      |              ^
+    7 | }
+    8 |

vlib/v/checker/tests/generics_fn_called_multi_args_mismatch.vv

@@ -1,7 +1,17 @@
 fn main() {
 	x := 'ab'.runes()[..1]
 	foo_str(1, x)
+
+	foo := Foo<int>{}
+	foo.info(x)
 }
 
 fn foo_str<T>(b T, a string) {
 }
+
+struct Foo<T> {
+	t T
+}
+
+fn (f Foo<T>) info(a string) {
+}