Nullish coalescing assignment operator doesn't work correctly with logical operators

[cshaa]

Bug Report

Using the nullish coalescing assignment operator ??= on a logical statement which contains a logical operator (&& or ||) fails to narrow the type, even though using the nullish coalescing operator ?? works correctly.

declare function acceptBoolean (s: boolean): void
declare let x: boolean | null, y: boolean | null;

x = x ?? (4 < 3 && 3 < 4);
acceptBoolean(x); // narrowed correctly

y ??= 4 < 3 && 3 < 4;
acceptBoolean(y); // error

Playground.

• TypeScript version 4.6.2

Probably related to: #40359, #40494, #44988 #42203

[RyanCavanaugh]

This looks identical to #40359 actually

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.