TS 4.7.4 crashes if tsconfig extends non-existing path

[cellog]

Bug Report

if a tsconfig.json consists solely of an extends clause that extends a non-existing path, Typescript crashes with:

➜  dashboard git:(upgrade-ts-4.7) ✗ yarn tsc --noEmit --project tsconfig.cypress.json
yarn run v1.19.1
$ /Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/.bin/tsc --noEmit --project tsconfig.cypress.json
/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:96888
                throw e;
                ^

Error: Debug Failure. Expected [object Object] === [object Object]. Parameter symbol already has a cached type which differs from newly assigned type
    at assignParameterType (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:64862:26)
    at assignContextualParameterTypes (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:64827:21)
    at contextuallyCheckFunctionExpressionOrObjectLiteralMethod (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:65229:29)
    at checkFunctionExpressionOrObjectLiteralMethod (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:65208:13)
    at checkExpressionWorker (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:66805:28)
    at checkExpression (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:66707:38)
    at checkExpressionWithContextualType (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:66396:28)
    at inferTypeArguments (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:62906:39)
    at chooseOverload (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:63566:53)
    at resolveCall (/Users/gregorybeaver/Documents/GitHub/platform/dashboard/node_modules/typescript/lib/tsc.js:63403:26)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Command failed: node /Users/gregorybeaver/.yvm/versions/v1.19.1/bin/yarn.js tsc --noEmit --project tsconfig.cypress.json
➜

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crash

🕗 Version & Regression Information

• This is a crash
• This changed between versions 4.4.4 and 4.7.4___
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about X___
• I was unable to test this on prior versions because available time_

⏯ Playground Link

💻 Code

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🙁 Actual behavior

🙂 Expected behavior

[MartinJohns]

Duplicate of #49383.

[fatcerberus]

That’s weird, it’s the same error as #49383 but the repros don’t seem at all related based on the analysis in the other issue.

[cellog]

thank you - I mis-diagnosed the error in my debugging, and this is indeed a dupe.