TypeError: Cannot read property 'length' of undefined in 'Object.find' during 'getApplicableRefactors' #21793
Description
This issue comes from crash dumps in telemetry. We've tried to de-duplicate issues on a best-effort basis, comparing the sequence of methods called and the command requested while ignoring line numbers.
TypeScript Version Prefix: 2.7.1
VSCode Version 1.20.0-insider
command requested: getApplicableRefactors
hitting sessions: 3195
proportion of all sessions: 0.01192729390420087
five line hash: 5916f9b992b55808646d21adefdcc25c
stack
TypeError: Cannot read property 'length' of undefined
at Object.find (tsserver.js:1523:34)
at recordUsagebySymbol (tsserver.js:81559:41)
at recordUsage (tsserver.js:81528:36)
at collectUsages (tsserver.js:81521:25)
at visitNode (tsserver.js:12595:24)
at Object.forEachChild (tsserver.js:12958:24)
at collectUsages (tsserver.js:81524:28)
at visitNode (tsserver.js:12595:24)
at Object.forEachChild (tsserver.js:12949:24)
at collectUsages (tsserver.js:81524:28)
at visitNode (tsserver.js:12595:24)
at Object.forEachChild (tsserver.js:12776:24)
at collectUsages (tsserver.js:81524:28)
at visitNode (tsserver.js:12595:24)
at Object.forEachChild (tsserver.js:12807:24)
at collectUsages (tsserver.js:81524:28)
at visitNodes (tsserver.js:12604:30)
at Object.forEachChild (tsserver.js:12796:24)
at collectUsages (tsserver.js:81524:28)
at collectReadsAndWrites (tsserver.js:81397:17)
at getPossibleExtractionsWorker (tsserver.js:80843:38)
at getPossibleExtractions (tsserver.js:80800:26)
at Object.getAvailableActions (tsserver.js:80399:35)
at unknown (tsserver.js:77085:128)
at getIterator (tsserver.js:1733:23)
at Object.next (tsserver.js:1728:35)
at Object.arrayFrom (tsserver.js:2267:32)
at Object.getApplicableRefactors (tsserver.js:77084:23)
at Object.getApplicableRefactors (tsserver.js:83299:32)
at IOSession.Session.getApplicableRefactors (tsserver.js:90156:53)
at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:89112:61)
at unknown (tsserver.js:90355:88)
at IOSession.Session.executeWithRequestId (tsserver.js:90346:28)
at IOSession.Session.executeCommand (tsserver.js:90355:33)
at IOSession.Session.onMessage (tsserver.js:90375:35)
at Interface.<anonymous> (tsserver.js:91576:27)
at emitOne (events.js:96:13)
at Interface.emit (events.js:191:7)
at Interface._onLine (readline.js:241:10)
at Interface._normalWrite (readline.js:384:12)
at Socket.ondata (readline.js:101:10)
at emitOne (events.js:96:13)
at Socket.emit (events.js:191:7)
at readableAddChunk (_stream_readable.js:178:18)
at Socket.Readable.push (_stream_readable.js:136:10)
at Pipe.onread (net.js:560:20)