Before You File a Proposal Please Confirm You Have Done The Following...

• I have searched for related issues and found none that match my proposal.
• I have searched the current rule list and found no rules that match my proposal.
• I have read the FAQ and my problem is not listed.

My proposal is suitable for this project

• I believe my proposal would be useful to the broader TypeScript community (meaning it is not a niche proposal).

Link to the rule's documentation

https://typescript-eslint.io/rules/prefer-nullish-coalescing/

Description

In #8262, a bug was fixed around prefer-nullish-coalescing's use of isNullableType(). However, it was mentioned during the PR (and I agree) that we probably should use the behavior in isNullableType() and just adapt the rule implementation details to not crash on it, see #8262 (comment).

Fail

// ignorePrimitives: /* all set to false */
declare const u: unknown;
const foo = u || 'bar'

Pass

// ignorePrimitives: /* all set to false */
declare const u: unknown;
const foo = u ?? 'bar'

// ignorePrimitives: /* any set to true */
declare const u: unknown;
const foo = u || 'bar'

Additional Info

No response