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TSServer: False expression: Expected line to be non-zero #41533

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@isidorn

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@isidorn

I was editing some JS code and saw the following in the developer console. Sorry for no clear steps

 ERR <syntax> TypeScript Server Error (4.1.1-rc)
Debug Failure. False expression: Expected line to be non-zero
Error: Debug Failure. False expression: Expected line to be non-zero
    at failIfInvalidLocation (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:150566:22)
    at ScriptInfo.positionToLineOffset (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:150533:17)
    at toProtocolTextSpan (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:158352:35)
    at /Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:157825:68
    at Array.map (<anonymous>)
    at IOSession.Session.toLocationNavigationTree (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:157825:39)
    at IOSession.Session.getNavigationTree (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:157836:32)
    at Session.handlers.ts.Map.ts.getEntries._a.<computed> (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:156626:61)
    at /Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:158278:88
    at IOSession.Session.executeWithRequestId (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:158269:28)
    at IOSession.Session.executeCommand (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:158278:33)
    at IOSession.Session.onMessage (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:158302:35)
    at Interface.<anonymous> (/Users/isidor/Development/vscode/extensions/node_modules/typescript/lib/tsserver.js:160512:27)
    at Interface.emit (events.js:223:5)
    at Interface._onLine (readline.js:315:10)
    at Interface._normalWrite (readline.js:460:12)
    at Socket.ondata (readline.js:172:10)
    at Socket.emit (events.js:223:5)
    at addChunk (_stream_readable.js:309:12)
    at readableAddChunk (_stream_readable.js:290:11)
    at Socket.Readable.push (_stream_readable.js:224:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:181:23): Error: <syntax> TypeScript Server Error (4.1.1-rc)

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