Minor fixes

Author: alexcrichton

crates/wasmtime/src/runtime/component/concurrent.rs

@@ -56,7 +56,7 @@ use {
             Component, ComponentInstanceId, HasData, HasSelf, Instance,
             func::{self, Func, Options},
         },
-        fiber::{self, AsyncCx, StoreFiber, StoreFiberYield},
+        fiber::{self, StoreFiber, StoreFiberYield},
         store::{StoreInner, StoreOpaque, StoreToken},
         vm::{
             SendSyncPtr, VMFuncRef, VMMemoryDefinition, VMStore,
@@ -1850,10 +1850,7 @@ impl Instance {
         assert!(suspend_reason.is_none());
         *suspend_reason = Some(reason);
 
-        let async_cx = AsyncCx::new(store.store_opaque_mut());
-        // SAFETY: The `Store` we used to create the `AsyncCx` above remains
-        // valid.
-        unsafe { async_cx.suspend(StoreFiberYield::ReleaseStore)? };
+        store.with_blocking(|_, cx| cx.suspend(StoreFiberYield::ReleaseStore))?;
 
         if let Some(task) = task {
             *self.concurrent_state_mut(store).guest_task() = old_guest_task;

crates/wasmtime/src/runtime/fiber.rs

@@ -401,7 +401,6 @@ impl StoreOpaque {
     /// # Panics
     ///
     /// Panics if this is invoked outside the context of a fiber.
-    #[expect(dead_code, reason = "will be used by async things soon")]
     pub(crate) fn with_blocking<R>(
         &mut self,
         f: impl FnOnce(&mut Self, &mut BlockingContext<'_, '_>) -> R,