try something else...

pkg/argus_wasm.d.ts

@@ -16,11 +16,17 @@ export class StateBuddyTrace {
   free(): void;
   [Symbol.dispose](): void;
 }
+export class StateBuddyTraceEntry {
+  private constructor();
+  free(): void;
+  [Symbol.dispose](): void;
+}
 
 export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembly.Module;
 
 export interface InitOutput {
   readonly memory: WebAssembly.Memory;
+  readonly __wbg_statebuddytraceentry_free: (a: number, b: number) => void;
   readonly __wbg_statebuddytrace_free: (a: number, b: number) => void;
   readonly eval_boolean: (a: number, b: number, c: number) => number;
   readonly __wbg_statebuddyevalresultentry_free: (a: number, b: number) => void;

pkg/argus_wasm.js

@@ -170,6 +170,26 @@ export class StateBuddyTrace {
 }
 if (Symbol.dispose) StateBuddyTrace.prototype[Symbol.dispose] = StateBuddyTrace.prototype.free;
 
+const StateBuddyTraceEntryFinalization = (typeof FinalizationRegistry === 'undefined')
+    ? { register: () => {}, unregister: () => {} }
+    : new FinalizationRegistry(ptr => wasm.__wbg_statebuddytraceentry_free(ptr >>> 0, 1));
+
+export class StateBuddyTraceEntry {
+
+    __destroy_into_raw() {
+        const ptr = this.__wbg_ptr;
+        this.__wbg_ptr = 0;
+        StateBuddyTraceEntryFinalization.unregister(this);
+        return ptr;
+    }
+
+    free() {
+        const ptr = this.__destroy_into_raw();
+        wasm.__wbg_statebuddytraceentry_free(ptr, 0);
+    }
+}
+if (Symbol.dispose) StateBuddyTraceEntry.prototype[Symbol.dispose] = StateBuddyTraceEntry.prototype.free;
+
 const EXPECTED_RESPONSE_TYPES = new Set(['basic', 'cors', 'default']);
 
 async function __wbg_load(module, imports) {

pkg/argus_wasm_bg.wasm.d.ts

@@ -1,6 +1,7 @@
 /* tslint:disable */
 /* eslint-disable */
 export const memory: WebAssembly.Memory;
+export const __wbg_statebuddytraceentry_free: (a: number, b: number) => void;
 export const __wbg_statebuddytrace_free: (a: number, b: number) => void;
 export const eval_boolean: (a: number, b: number, c: number) => number;
 export const __wbg_statebuddyevalresultentry_free: (a: number, b: number) => void;

src/lib.rs

@@ -76,7 +76,7 @@ impl<'a> Trace for TraceMap<'a> {
 //     }
 // }
 
-#[derive(Serialize, Deserialize)]
+#[wasm_bindgen(getter_with_clone)]
 pub struct StateBuddyTraceEntry {
     simtime: f64,
     inputEvent: String,