JSDoc @enum — Debug failure: Should only get Alias here

[mjbvz]

From https://github.com/microsoft/vscode/issues/85500

TypeScript Version: 3.8.0-dev.20191125

Search Terms:

• jsdoc
• @enum
• enum
• quick info

Code
For the JS:

/**
 * @enum {string}
 */
const testString = {
    one: "1",
    two: "2"
};

export { testString };

Hover over testString in the export

Bug

TypeScript Server Error (3.8.0-dev.20191125)
Debug Failure. False expression: Should only get Alias here.
Error: Debug Failure. False expression: Should only get Alias here.
    at Object.resolveAlias [as getAliasedSymbol] (tsserver.js:35043:22)
    at getSymbolDisplayPartsDocumentationAndSymbolKind (tsserver.js:116236:54)
    at Object.getSymbolDisplayPartsDocumentationAndSymbolKind (tsserver.js:116244:48)
    at tsserver.js:131018:41
    at Object.runWithCancellationToken (tsserver.js:33400:28)
    at Object.getQuickInfoAtPosition (tsserver.js:131017:34)
    at IOSession.Session.getQuickInfoWorker (tsserver.js:140506:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139541:61)
    at tsserver.js:141124:88
    at IOSession.Session.executeWithRequestId (tsserver.js:141115:28)
    at IOSession.Session.executeCommand (tsserver.js:141124:33)
    at IOSession.Session.onMessage (tsserver.js:141147:35)
    at Interface.<anonymous> (tsserver.js:142462:27)
    at Interface.emit (events.js:200:13)
    at Interface._onLine (readline.js:314:10)
    at Interface._normalWrite (readline.js:459:12)
    at Socket.ondata (readline.js:170:10)
    at Socket.emit (events.js:200:13)
    at addChunk (_stream_readable.js:294:12)
    at readableAddChunk (_stream_readable.js:275:11)
    at Socket.Readable.push (_stream_readable.js:210:10)