Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I havesearched for related issues and found none that matched my issue.
• I haveread the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#ts=4.9.3&showAST=es&fileType=.tsx&code=HYQwtgpgzgDiDGEAEBBJBvAUEpEAeMA9gE4AuuwArmEgEIbY5IDCANIzgCLs4C%2Bm-TABMI8ADYhiyeIWBRyIAFyoAdLUyYoAdwCWpeAAskAChABKBjnggoyFGpXNlWJkgBGUkAGtG-XkA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6ZAd0vzIAt6AHrwCGsZPkoA3RExTJafRGQDW6KImjQA9tEjgwAXxAGgA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

namespaceA{exportenumB{C,D,}}declareconsta:A.Bswitch(a){caseA.B.C:{break}}

ESLint Config

{"rules":{"@typescript-eslint/switch-exhaustiveness-check":"error"}}

tsconfig

No response

Expected Result

switch(a){caseA.B.C:{break}caseA.B.D:{thrownewError('Not implemented yet: A.B.D case')}}

Actual Result

switch(a){caseA.B.C:{break}caseB.D:{thrownewError('Not implemented yet: B.D case')}}

Additional Info

In the actual codebase, the enum is namespaced under an ESMimport *, rather than a TypeScriptnamespace. However, I think both cases should be fixed by any potential PR that fixes this