diff --git a/.github/workflows/npmpkg.yml b/.github/workflows/npmpkg.yml
index eb5265c6..a5327a87 100644
--- a/.github/workflows/npmpkg.yml
+++ b/.github/workflows/npmpkg.yml
@@ -23,7 +23,7 @@ jobs:
       - name: install rust
         run: cargo install wasm-pack
       - name: build wasm
-        run: wasm-pack build --target bundler --no-default-features --scope pivot-lang --release
+        run: wasm-pack build --target bundler --no-default-features --scope pivot-lang --release --locked
       # Setup .npmrc file to publish to npm
       - uses: actions/setup-node@v3
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index af2978de..12511b56 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -88,7 +88,7 @@ jobs:
       CARGO_TARGET_DIR: ${{ matrix.CARGO_TARGET_DIR }}
       KAGARI_LIB_ROOT: ${{ github.workspace }}${{ matrix.KAGARI_LIB_ROOT }}
       PL_ROOT: ${{ github.workspace }}${{ matrix.PL_ROOT }}
-      GC_LOG: warn
+      GC_LOG: trace
     steps:
       - uses: actions/checkout@v4
         with:
@@ -120,7 +120,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: build
-          args: --manifest-path vm/Cargo.toml --target-dir target -vv
+          args: --manifest-path vm/Cargo.toml --target-dir target -vv --no-default-features --features "static,immix,jitdylib"
 
       # - name: build plc
       #   uses: actions-rs/cargo@v1
diff --git a/immix b/immix
index e8ee732b..b7f8fc61 160000
--- a/immix
+++ b/immix
@@ -1 +1 @@
-Subproject commit e8ee732bdfaeba9b122245573937fb27ab09f692
+Subproject commit b7f8fc61b704de4d1e9115289e5e763ff7e94247
diff --git a/src/ast/ctx/cast.rs b/src/ast/ctx/cast.rs
index 35e72991..cbfecdd4 100644
--- a/src/ast/ctx/cast.rs
+++ b/src/ast/ctx/cast.rs
@@ -288,9 +288,7 @@ impl<'a, 'ctx> Ctx<'a> {
         if let PLType::Union(u) = &*target_pltype.borrow() {
             let mut union_members = vec![];
             for tp in &u.sum_types {
-                let tp = self.run_in_type_mod(u, |ctx,u|{
-                    tp.get_type(ctx, builder, true)
-                })?;
+                let tp = self.run_in_type_mod(u, |ctx, _| tp.get_type(ctx, builder, true))?;
                 union_members.push(tp);
             }
             for (i, tp) in union_members.iter().enumerate() {
diff --git a/src/ast/test.rs b/src/ast/test.rs
index 375cc9df..26cc2684 100644
--- a/src/ast/test.rs
+++ b/src/ast/test.rs
@@ -510,12 +510,17 @@ fn test_compile() {
     let exe = crate::utils::canonicalize(&exe)
         .unwrap_or_else(|_| panic!("static compiled file not found {:?}", exe));
     eprintln!("exec: {:?}", exe);
+    eprintln!(
+        "start: {:?}",
+        std::time::SystemTime::now().duration_since(std::time::SystemTime::UNIX_EPOCH)
+    );
     let mut child = Command::new(exe.to_str().unwrap())
+        .env("GC_LOG", "info")
         .spawn()
         .expect("failed to execute compiled program");
 
     let o = child
-        .wait_timeout(std::time::Duration::from_secs(50))
+        .wait_timeout(std::time::Duration::from_secs(500))
         .expect("failed to wait on child");
     if o.is_none() {
         child.kill().expect("failed to kill child");
diff --git a/test/test/std_test.pi b/test/test/std_test.pi
index 9e1de084..74f7dc73 100644
--- a/test/test/std_test.pi
+++ b/test/test/std_test.pi
@@ -39,6 +39,7 @@ impl Task<i64> for CustomTask {
 
 pub fn test_std() void {
     iter::test_generator();
+    println!("test_gen done");
     let re = "abcde".index_of("cde");
     let chars = [1,2,3];
     let subchars = [3];
@@ -72,7 +73,7 @@ pub fn test_std() void {
     let mi = math::min(1.0, 2.0);
     panic::assert(mi==1.0);
     panic::assert((math::cos(math::PI) - -1.0).abs() < 0.0000001);
-
+    println!("math done");
     let task = async_f1();
     task.poll(||=>{
         return;
@@ -103,7 +104,9 @@ pub fn test_std() void {
     });
     panic::assert(b == 100);
     fn1(test{a:9999});
+    println!("async done");
     test_json();
+    println!("json done");
     return;
 }
 
diff --git a/vm/src/lib.rs b/vm/src/lib.rs
index 54ae1758..73653755 100644
--- a/vm/src/lib.rs
+++ b/vm/src/lib.rs
@@ -28,6 +28,11 @@ fn printi64ln(i: i64) {
     println!("{}", i);
 }
 
+#[is_runtime]
+fn eprinti64ln(i: i64) {
+    eprintln!("{}", i);
+}
+
 #[is_runtime]
 fn pl_panic() {
     println!("pivot lang panic occured!");
@@ -91,21 +96,19 @@ fn vm_ftoa(f: f32, rec: *mut u8) {
 }
 
 #[is_runtime]
-fn new_thread(f: *mut i128, sp:*mut u8) {
+fn new_thread(f: *mut i128, sp: *mut u8) {
     // f's first 8 byte is fn pointer, next 8 byte is data pointer
     let ptr = f as *const i64;
     let f_ptr = ptr as *const extern "C" fn(i64);
     let data_ptr = unsafe { *ptr.offset(1) };
     let func = unsafe { *f_ptr };
     let (s, r) = channel::<()>();
-    let ptr_i = ptr as i64;
+    // let ptr_i = ptr as i64;
     immix::pin(data_ptr as _);
     // immix::gc_keep_live(data_ptr as _);
     // immix::gc_add_root(data_ptr  as *mut _, ObjectType::Pointer.int_value());
     let c = move || {
         // thread::sleep(std::time::Duration::from_secs(1));
-        let sp = immix::Collector::current_sp();
-        immix::set_high_sp(sp);
         // immix::gc_keep_live(data_ptr as _);
         // immix::set_evacuation(false);
         // immix::gc_add_root(&mut f as *mut _ as *mut _, ObjectType::Trait.int_value());