TypeScript Version: 3.8.0-dev.20200101

Search Terms: bigint, property name

Code

({1n: 123});

Expected behavior:
No error

Actual behavior:
Property Assignment Expected

Playground Link: https://www.typescriptlang.org/play/?ts=3.8.0-dev.20200101&ssl=1&ssc=1&pln=1&pc=15#code/BQbwBAjAdgXJBMBmMBfAlAbiA
Related Issues:

https://github.com/tc39/test262/pull/2457
https://bugs.chromium.org/p/v8/issues/detail?id=10083

https://github.com/microsoft/TypeScript/commit/ecd12453f42cd95503bfd0a56a67b732a0ea83d4 should be partially reverted.