Have StoreContext::data return &'a T (#5855)

crates/wasmtime/src/store.rs

@@ -980,7 +980,7 @@ impl<'a, T> StoreContext<'a, T> {
     /// Access the underlying data owned by this `Store`.
     ///
     /// Same as [`Store::data`].
-    pub fn data(&self) -> &T {
+    pub fn data(&self) -> &'a T {
         self.0.data()
     }
 

crates/wasmtime/src/store/context.rs

@@ -161,6 +161,13 @@ impl<T> AsContextMut for StoreContextMut<'_, T> {
     }
 }
 
+impl<'a, T> From<StoreContextMut<'a, T>> for StoreContext<'a, T> {
+    #[inline]
+    fn from(store: StoreContextMut<'a, T>) -> StoreContext<'a, T> {
+        StoreContext(store.0)
+    }
+}
+
 // Implementations for internal consumers, but these aren't public types so
 // they're not publicly accessible for crate consumers.
 impl<T> AsContext for &'_ StoreInner<T> {