Internal error in tsc: "TypeError: Cannot read properties of undefined (reading 'flags')"

🔎 Search Terms

TypeError: Cannot read properties of undefined (reading 'flags')

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about unhandled TypeScript errors

⏯ Repository Link

https://github.com/GaurangTandon/tsc-issue-repro

💻 Code

const UPDATE_MARKER_FUNC = 'updateMarkerPosition';
window[UPDATE_MARKER_FUNC] = (coordinates, color = 'red') => {};

🙁 Actual behavior

/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:122142
      throw e;
      ^

TypeError: Cannot read properties of undefined (reading 'flags')
    at getMembersOfSymbol (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:56777:19)
    at getLateBoundSymbol (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:56787:11)
    at getSymbolOfDeclaration (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:49588:43)
    at getSymbolOfNode (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:49591:34)
    at getFunctionExpressionParentSymbolOrSymbol (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:49598:198)
    at getResolvedMembersOrExportsOfSymbol (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:56742:27)
    at getExportsOfSymbol (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:49486:61)
    at resolveAnonymousTypeMembers (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:57350:19)
    at resolveStructuredTypeMembers (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:57698:11)
    at getSignaturesOfStructuredType (/Users/blazegt/test-tsc/node_modules/typescript/lib/_tsc.js:58389:24)

Node.js v20.18.3

🙂 Expected behavior

Internal TypeScript errors should not be thrown.

Additional information about the issue

No response