Bug Report

The provided code fails with compiler error: error TS2318: Cannot find global type 'BigInt'. without any location information.

🔎 Search Terms

BigInt, Object.freeze

🕗 Version & Regression Information

This changed between versions 4.6.4 and 4.7-beta

⏯ Playground Link

No playground reproduce for this bug as it's not possible to set target and lib differently from the playground.

Steps to reproduce

mkdir test_47rc
cd test_47rc
npm init
npm install typescript@rc
echo "Object.freeze({foo() {}});" > index.ts
./node_modules/.bin/tsc --target es2020 --lib es2019 index.ts

Note : ./node_modules/.bin/tsc --target es2020 --lib es2020 index.ts does not print an error.

💻 Code

Object.freeze({foo() {}});

🙁 Actual behavior

TypeScript compiler prints error TS2318: Cannot find global type 'BigInt'. without any source location.

🙂 Expected behavior

I'm not sure what the actual behavior here needs to be, but at least the new additioal type definition of Object.freeze in lib.es5.d.ts start to trigger this failure.

    /**
     * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
     * @param o Object on which to lock the attributes.
     */
    freeze<T extends {[idx: string]: U | null | undefined | object}, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>;

I think the lib.es5.d.ts should not contain type definition that uses bigint

Please let me know if this should go to https://github.com/microsoft/TypeScript-DOM-lib-generator/issues instead.