Debug Failure. False expression: in openExternalProjects in getOrCreateScriptInfoWorker

[minestarks]

This is a high hitter from VS telemetry and impacts a wide range of TS versions, at least 2.7-3.7

Command: openExternalProjects

Message: Error processing request. Debug Failure. False expression:

Stack:

ProjectService.getOrCreateScriptInfoWorker(tsserver.js:137708:30)
ProjectService.getOrCreateScriptInfoNotOpenedByClientForNormalizedPath(tsserver.js:137681:33)
ProjectService.updateNonInferredProjectFiles(tsserver.js:137368:43)
ProjectService.addFilesToNonInferredProject(tsserver.js:137259:22)
ProjectService.createExternalProject(tsserver.js:137210:22)
ProjectService.openExternalProject(tsserver.js:138654:40)
ProjectService.openExternalProjects(tsserver.js:138406:26)
Session.handlers.ts.createMapFromTemplate._a.(tsserver.js:139167:46)
unknown_function(tsserver.js:140854:88)
IOSession.Session.executeWithRequestId(tsserver.js:140845:28)
IOSession.Session.executeCommand(tsserver.js:140854:33)
IOSession.Session.onMessage(tsserver.js:140877:35)
Interface.(tsserver.js:142192:27)

VS bug https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1044433

[minestarks]

Here is a repro https://developercommunity.visualstudio.com/content/problem/771738/javascript-file-in-node-module-that-begins-with-is.html