From 0ef082d4b474b7d36d7668cf21ad8a9922469189 Mon Sep 17 00:00:00 2001
From: "Marc J. Schmidt" <marc@marcjschmidt.de>
Date: Wed, 28 Feb 2024 20:43:21 +0100
Subject: [PATCH] fix(type): better error message when fast path type
 resolution fails due to undefined symbols

---
 packages/type/src/reflection/reflection.ts | 16 ++++++++++++++--
 packages/type/src/utils.ts                 |  4 ++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/packages/type/src/reflection/reflection.ts b/packages/type/src/reflection/reflection.ts
index e907d867e..f5aff5229 100644
--- a/packages/type/src/reflection/reflection.ts
+++ b/packages/type/src/reflection/reflection.ts
@@ -50,7 +50,16 @@ import {
     TypePropertySignature,
     TypeTemplateLiteral,
 } from './type.js';
-import { AbstractClassType, arrayRemoveItem, ClassType, getClassName, isArray, isClass, isPrototypeOfBase, stringifyValueWithType } from '@deepkit/core';
+import {
+    AbstractClassType,
+    arrayRemoveItem,
+    ClassType,
+    getClassName,
+    isArray,
+    isClass,
+    isPrototypeOfBase,
+    stringifyValueWithType,
+} from '@deepkit/core';
 import { Packed, resolvePacked, resolveRuntimeType } from './processor.js';
 import { NoTypeReceived } from '../utils.js';
 import { findCommonLiteral } from '../inheritance.js';
@@ -85,7 +94,10 @@ export function resolveReceiveType(type?: Packed | Type | ClassType | AbstractCl
             //n! represents a simple inline: [Op.inline, 0]
             //P7! represents a class reference: [Op.Frame, Op.classReference, 0] (Op.Frame seems unnecessary)
             typeFn = (type as any)[0] as Function;
-            type = typeFn() as Packed | Type | ClassType | AbstractClassType | ReflectionClass<any>;
+            type = typeFn() as Packed | Type | ClassType | AbstractClassType | ReflectionClass<any> | undefined;
+            if (!type) {
+                throw new Error(`No type resolved for ${typeFn.toString()}. Circular import or no runtime type available.`);
+            }
         }
     }
 
diff --git a/packages/type/src/utils.ts b/packages/type/src/utils.ts
index 4204a1d50..2810b5807 100644
--- a/packages/type/src/utils.ts
+++ b/packages/type/src/utils.ts
@@ -11,8 +11,8 @@
 import { stringify, v4 } from 'uuid';
 
 export class NoTypeReceived extends Error {
-    constructor() {
-        super('No type information received. Is deepkit/type correctly installed?');
+    constructor(message: string = 'No type information received. Circular import or no runtime type available.') {
+        super(message);
     }
 }