diff --git a/crates/js-component-bindgen/src/transpile_bindgen.rs b/crates/js-component-bindgen/src/transpile_bindgen.rs
index bf14eb4ea..9aa1d1f80 100644
--- a/crates/js-component-bindgen/src/transpile_bindgen.rs
+++ b/crates/js-component-bindgen/src/transpile_bindgen.rs
@@ -914,7 +914,12 @@ impl<'a> Instantiator<'a, '_> {
                     .gen
                     .local_names
                     .get_or_create(
-                        &format!("import:{}-{}", import_name, &func.name),
+                        &format!(
+                            "import:{}-{}-{}",
+                            import_specifier,
+                            maybe_iface_member.as_deref().unwrap_or(""),
+                            &func.name
+                        ),
                         &func.name,
                     )
                     .0
diff --git a/packages/preview2-shim/lib/io/worker-io.js b/packages/preview2-shim/lib/io/worker-io.js
index 7ffd3795c..41d15b997 100644
--- a/packages/preview2-shim/lib/io/worker-io.js
+++ b/packages/preview2-shim/lib/io/worker-io.js
@@ -231,16 +231,14 @@ class OutputStream {
     return streamIoErrorCall(
       OUTPUT_STREAM_SPLICE | this.#streamType,
       this.#id,
-      src.#id,
-      len
+      { src: src.#id, len }
     );
   }
   blockingSplice(src, len) {
     return streamIoErrorCall(
       OUTPUT_STREAM_BLOCKING_SPLICE | this.#streamType,
       this.#id,
-      inputStreamId(src),
-      len
+      { src: inputStreamId(src), len }
     );
   }
   subscribe() {
@@ -279,21 +277,16 @@ export const streams = { InputStream, OutputStream };
 
 class Pollable {
   #id;
-  #ready = false;
   get _id() {
     return this.#id;
   }
   ready() {
-    if (this.#ready) return true;
-    const ready = ioCall(POLL_POLLABLE_READY, this.#id);
-    if (ready) this.#ready = true;
-    return ready;
+    if (this.#id === 0) return true;
+    return ioCall(POLL_POLLABLE_READY, this.#id);
   }
   block() {
-    if (!this.#ready) {
-      ioCall(POLL_POLLABLE_BLOCK, this.#id);
-      this.#ready = true;
-    }
+    if (this.#id === 0) return;
+    ioCall(POLL_POLLABLE_BLOCK, this.#id);
   }
   static _getId(pollable) {
     return pollable.#id;
@@ -301,31 +294,20 @@ class Pollable {
   static _create(id) {
     const pollable = new Pollable();
     pollable.#id = id;
-    if (id === 0) pollable.#ready = true;
     return pollable;
   }
-  static _markReady(pollable) {
-    pollable.#ready = true;
-  }
 }
 
 export const pollableCreate = Pollable._create;
 delete Pollable._create;
 
-const pollableMarkReady = Pollable._markReady;
-delete Pollable._markReady;
-
 const pollableGetId = Pollable._getId;
 delete Pollable._getId;
 
 export const poll = {
   Pollable,
   poll(list) {
-    const doneList = ioCall(POLL_POLL_LIST, null, list.map(pollableGetId));
-    for (const idx of doneList) {
-      pollableMarkReady(list[idx]);
-    }
-    return doneList;
+    return ioCall(POLL_POLL_LIST, null, list.map(pollableGetId));
   },
 };
 
diff --git a/packages/preview2-shim/lib/io/worker-thread.js b/packages/preview2-shim/lib/io/worker-thread.js
index 758a82459..153e089b8 100644
--- a/packages/preview2-shim/lib/io/worker-thread.js
+++ b/packages/preview2-shim/lib/io/worker-thread.js
@@ -518,7 +518,6 @@ function handle(call, id, payload) {
     case INPUT_STREAM_CREATE | STDIN: {
       const stream = createReadStream(null, {
         fd: 0,
-        autoClose: false,
         highWaterMark: 64 * 1024,
       });
       // for some reason fs streams dont emit readable on end
@@ -789,7 +788,7 @@ function handle(call, id, payload) {
           for (const [idx, id] of payload.entries()) {
             if (!unfinishedPolls.has(id)) doneList.push(idx);
           }
-          if (doneList.length > 0) return doneList;
+          if (doneList.length > 0) return new Uint32Array(doneList);
           // if all polls are promise type, we just race them
           return Promise.race(
             payload.map((id) => unfinishedPolls.get(id))
@@ -799,7 +798,7 @@ function handle(call, id, payload) {
             }
             if (doneList.length === 0)
               throw new Error("poll promise did not unregister poll");
-            return doneList;
+            return new Uint32Array(doneList);
           });
         }
 
diff --git a/submodules/wasmtime b/submodules/wasmtime
index 80cc33beb..57632473b 160000
--- a/submodules/wasmtime
+++ b/submodules/wasmtime
@@ -1 +1 @@
-Subproject commit 80cc33beb3764f879c66393e7a3aabc46fe5e84d
+Subproject commit 57632473b86ce295390b1424c7dd7a4c450c32a8