fix merge

src/core/contracts/error-handling.ts

@@ -10,7 +10,7 @@ export interface ErrorHandling {
      */
     crash(err: Error): never;
     /**
-     * A function that is called on every crash.
+     * A function that is called on every throw.
      * @param error
      */
     updateAlive(error: Error): void;

src/handlers/event-utils.ts

@@ -30,7 +30,7 @@ import { SernEmitter } from '../core';
 import { Err, Ok, Result } from 'ts-results-es';
 import type { AnyFunction, Awaitable } from '../types/utility';
 import type { ControlPlugin } from '../types/core-plugin';
-import type { AnyModule, CommandModule, Module, OnError, Processed } from '../types/core-modules';
+import type { AnyModule, CommandModule, ErrorResponse, Module, OnError, Processed } from '../types/core-modules';
 import type { ImportPayload } from '../types/core';
 
 function createGenericHandler<Source, Narrowed extends Source, Output>(
@@ -166,8 +166,11 @@ export function executeModule(
                 return EMPTY;
             } else {
                 if(onError) {
-                    const payload = onError() as CommandError.Response
-                    
+                    const err = onError() as CommandError.Response
+                    if(!err) {
+                        return throwError(() => 
+                                          SernEmitter.failure(module, "Failed to handle onError: returned nothing"));
+                    }
                     return EMPTY
                 }
                 return throwError(() => SernEmitter.failure(module, result.error));

src/types/core-modules.ts

@@ -21,6 +21,11 @@ import { Awaitable, Args, SlashOptions, SernEventsMapping, AnyFunction } from '.
 
 export type OnError = Record<string, AnyFunction>|undefined
 
+export interface ErrorResponse<T> {
+    status: 'throw' | 'handle' 
+    body: T
+}
+
 export interface CommandMeta {
     fullPath: string;
     id: string;