Error when using a layout property outside of a layout

sixtyfps_compiler/passes/lower_layout.rs

@@ -115,10 +115,12 @@ pub fn lower_layouts(component: &Rc<Component>, diag: &mut BuildDiagnostics) {
                 });
                 continue;
             } else {
+                check_no_layout_properties(&child, diag);
                 elem.children.push(child);
             }
         }
     });
+    check_no_layout_properties(&component.root_element, diag);
 }
 
 impl GridLayout {
@@ -170,3 +172,11 @@ fn eval_const_expr(
         }
     }
 }
+
+fn check_no_layout_properties(item: &ElementRc, diag: &mut BuildDiagnostics) {
+    for (prop, expr) in item.borrow().bindings.iter() {
+        if matches!(prop.as_ref(), "col" | "row" | "colspan" | "rowspan") {
+            diag.push_error(format!("{} used outside of a GridLayout", prop), expr);
+        }
+    }
+}

sixtyfps_compiler/tests/syntax/basic/layout2.60

@@ -23,9 +23,14 @@ X := Rectangle {
         Text{
             row: 200000; // that's actually bigger than 65535
 //              ^error{'row' must be a positive integer}
+            Rectangle { row: 3; }
+//                          ^error{row used outside of a GridLayout}
         }
     }
 
-    colspan: 3;
-//FIXME: error{colspan used outside of a layout}
+    Text { colspan: 3; }
+//                 ^error{colspan used outside of a GridLayout}
+    col: 3;
+//      ^error{col used outside of a GridLayout}
+
 }

sixtyfps_compiler/tests/syntax_tests.rs

@@ -8,8 +8,10 @@
 
 #[test]
 fn syntax_tests() -> std::io::Result<()> {
-    if let Some(specific_test) =
-        std::env::args().skip(1).skip_while(|arg| arg.starts_with("--") || arg == "main").next()
+    if let Some(specific_test) = std::env::args()
+        .skip(1)
+        .skip_while(|arg| arg.starts_with("--") || arg == "syntax_tests")
+        .next()
     {
         let mut path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
         path.push("tests");