fix variable in pipe start (#1932)

Signed-off-by: Jess Frazelle <github@jessfraz.com>

src/wasm-lib/tests/executor/main.rs

@@ -481,6 +481,17 @@ async fn serial_test_execute_engine_error_return() {
     );
 }
 
+#[tokio::test(flavor = "multi_thread")]
+async fn serial_test_execute_i_shape() {
+    // This is some code from lee that starts a pipe expression with a variable.
+    let code = include_str!("inputs/i_shape.kcl");
+
+    let result = execute_and_snapshot(code, kittycad::types::UnitLength::Mm)
+        .await
+        .unwrap();
+    twenty_twenty::assert_image("tests/executor/outputs/i_shape.png", &result, 0.999);
+}
+
 #[tokio::test(flavor = "multi_thread")]
 #[ignore] // ignore until more stack fixes
 async fn serial_test_execute_pipes_on_pipes() {