Multiple fields with anyOf and self ref causes Maximum call stack size exceeded #724
Description
Prerequisites
- I have written a descriptive issue title
- I have searched existing issues to ensure the bug has not already been reported
Fastify version
4.28.0 (latest)
Plugin version
5.16.1 (latest)
Node.js version
20.11.0 (LTS)
Operating system
macOS Sonoma 14.5
Description
When defining a schema with at least two anyOf fields or oneOf fields with self ref like so :
import fastJson from 'fast-json-stringify';
const schema = {
$schema: 'http://json-schema.org/draft-07/schema#',
type: 'object',
properties: {
field: { type: 'string' },
field1: { anyOf: [{ $ref: '#' }, { type: 'null' }] },
field2: { anyOf: [{ $ref: '#' }, { type: 'null' }] },
},
};
fastJson(schema.valueOf());
I'm getting this following error :
RangeError: Maximum call stack size exceeded
at RefResolver.#addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:143:14)
at RefResolver.#addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:165:24)
at RefResolver.#addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:165:24)
at RefResolver.#addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:165:24)
at RefResolver.#addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:165:24)
at RefResolver.addSchema (../../node_modules/.pnpm/[email protected]/node_modules/json-schema-ref-resolver/index.js:30:20)
at mergeLocations (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:433:23)
at buildOneOf (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:868:24)
at buildValue (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:979:12)
at buildInnerObject (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:380:11)
at buildObject (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:501:9)
at buildSingleTypeSerializer (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:768:24)
at buildValue (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:1010:13)
at buildOneOf (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:874:26)
at buildValue (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify/index.js:979:12)
at buildInnerObject (../../node_modules/.pnpm/[email protected]/node_modules/fast-json-stringify
(output truncated for readability)
Fastify fails to start when using this schema in routes
Is this kind of schema possible ? in my case, anyOf / oneOf + self reference & null are required.