Circular scope compilation bug

[TizzySaurus]

Report a bug

🔎 Search Terms

circular scope, scope compilation bug, Apply is not a function.

🧩 Context

• ArkType version: 2.0.0-rc.21
• TypeScript version (5.1+): Version 5.7.0-dev.20241002
• Other context you think may be relevant (JS flavor, OS, etc.): N/A

🧑‍💻 Repro

Minimum repro:

import { scope, type } from "arktype"

const $ = scope({
    Foo: {
        "oneOf?": "Bar[]" // NB: don't get the error if this is not an array
    },
    Bar: "Foo"
}).export()

const baz = $.Bar.pipe((_: object): type.Any | undefined => {
    console.log("this never gets logged since pipe isn't entered")
    return type("string")
})

const r = baz({ oneOf: [{}] }) // throws "TypeError: this.Foo1Apply is not a function"
console.log(r)

[Kal-Aster]

I encountered this right now 💀

Meanwhile is there any workaround?

[ssalbdivad]

As a temporary workaround, you can try passing { jitless: true } to your scope since this issue seems specific to precompilation:

const types = scope(
	{
		Foo: {
			"oneOf?": "Bar[]"
		},
		Bar: "Foo"
	},
	{
		jitless: true
	}
).export()