throw on serializing function

Author: Varixo

packages/qwik/src/core/shared/error/error.ts

@@ -56,6 +56,7 @@ export const codeToText = (code: number, ...parts: any[]): string => {
       'WrappedSignal is read-only', // 48
       'Attribute value is unsafe for SSR', // 49
       'SerializerSymbol function returned rejected promise', // 50
+      'Serialization Error: Cannot serialize function: {{0}}', // 51
     ];
     let text = MAP[code] ?? '';
     if (parts.length) {
@@ -126,6 +127,7 @@ export const enum QError {
   wrappedReadOnly = 48,
   unsafeAttr = 49,
   serializerSymbolRejectedPromise = 50,
+  serializeErrorCannotSerializeFunction = 51,
 }
 
 export const qError = (code: number, errorMessageArgs: any[] = []): Error => {

packages/qwik/src/core/shared/shared-serialization.ts

@@ -973,9 +973,7 @@ async function serialize(serializationContext: SerializationContext): Promise<vo
         serializationContext.$renderSymbols$.add(qrl.$symbol$);
         output(TypeIds.Component, [qrl]);
       } else {
-        // TODO this happens for inline components with render props like Resource
-        console.error('Cannot serialize function (ignoring for now): ' + value.toString());
-        output(TypeIds.Constant, Constants.Undefined);
+        throw qError(QError.serializeErrorCannotSerializeFunction, [value.toString()]);
       }
     } else if (typeof value === 'number') {
       if (Number.isNaN(value)) {