TypeError: Cannot read property 'emitNode' of undefined in 'Object.getStartsOnNewLine' during 'signatureHelp'

[typescript-bot]

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: 3.5.3
VSCode version: 1.37.0
Command requested: signatureHelp
Hitting sessions: 355
Five line hash: fb17c24edcf02bc3f301efc3153a794b
Stack:

    at getStartsOnNewLine (tsserver.js:64102:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:87446:27)
    at emitNodeList (tsserver.js:87231:29)
    at emitList (tsserver.js:87128:13)
    at writeList (tsserver.js:84571:13)
    at <anonymous> (tsserver.js:108011:29)
    at mapToDisplayParts (tsserver.js:97547:13)
    at itemInfoForParameters (tsserver.js:108008:41)
    at getSignatureHelpItem (tsserver.js:107974:95)
    at <anonymous> (tsserver.js:107947:79)
    at unknown (suppressed.js)
    at createSignatureHelpItems (tsserver.js:107947:36)
    at <anonymous> (tsserver.js:107539:23)
    at runWithCancellationToken (tsserver.js:31649:28)
    at getSignatureHelpItems (tsserver.js:107537:32)
    at getSignatureHelpItems (tsserver.js:122266:37)
    at Session.getSignatureHelpItems (tsserver.js:131224:62)
    at _a.<computed> (tsserver.js:130124:61)
    at <anonymous> (tsserver.js:131671:88)
    at Session.executeWithRequestId (tsserver.js:131662:28)
    at Session.executeCommand (tsserver.js:131671:33)
    at Session.onMessage (tsserver.js:131693:35)
    at <anonymous> (tsserver.js:132984:27)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.6.2
VSCode version: 1.38.0-insider
Command requested: signatureHelp
Hitting sessions: 225
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:65737:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:89620:27)
    at emitNodeList (tsserver.js:89405:29)
    at emitList (tsserver.js:89302:13)
    at Object.writeList (tsserver.js:86739:13)
    at unknown (tsserver.js:110859:29)
    at Object.mapToDisplayParts (tsserver.js:100088:13)
    at itemInfoForParameters (tsserver.js:110856:41)
    at getSignatureHelpItem (tsserver.js:110822:95)
    at unknown (tsserver.js:110795:79)
    at suppressed_frame()
    at createSignatureHelpItems (tsserver.js:110795:36)
    at unknown (tsserver.js:110387:23)
    at Object.runWithCancellationToken (tsserver.js:32415:28)
    at Object.getSignatureHelpItems (tsserver.js:110385:32)
    at Proxy.getSignatureHelpItems (tsserver.js:125631:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:134738:62)
    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:133666:61)
    at unknown (tsserver.js:135178:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:135169:28)
    at IOSession.Session.executeCommand (tsserver.js:135178:33)
    at IOSession.Session.onMessage (tsserver.js:135201:35)
    at Interface.<anonymous> (tsserver.js:136516:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.6.3
VSCode version: 1.39.0-insider
Command requested: signatureHelp
Hitting sessions: 380
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:65811:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:89699:27)
    at emitNodeList (tsserver.js:89484:29)
    at emitList (tsserver.js:89381:13)
    at Object.writeList (tsserver.js:86818:13)
    at unknown (tsserver.js:110952:29)
    at Object.mapToDisplayParts (tsserver.js:100181:13)
    at itemInfoForParameters (tsserver.js:110949:41)
    at getSignatureHelpItem (tsserver.js:110915:95)
    at unknown (tsserver.js:110888:79)
    at suppressed_frame()
    at createSignatureHelpItems (tsserver.js:110888:36)
    at unknown (tsserver.js:110480:23)
    at Object.runWithCancellationToken (tsserver.js:32458:28)
    at Object.getSignatureHelpItems (tsserver.js:110478:32)
    at Object.getSignatureHelpItems (tsserver.js:125709:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:134816:62)
    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:133744:61)
    at unknown (tsserver.js:135256:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:135247:28)
    at IOSession.Session.executeCommand (tsserver.js:135256:33)
    at IOSession.Session.onMessage (tsserver.js:135279:35)
    at Interface.<anonymous> (tsserver.js:136594:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[mjbvz]

Still a top hitter in 3.7.0-dev.20191015

TypeError: Cannot read property 'emitNode' of undefined
	    at Object.getCommentRange (tsserver.js:68874:29)
	    at emitNodeList (tsserver.js:92716:51)
	    at emitList (tsserver.js:92595:13)
	    at Object.writeList (tsserver.js:90019:13)
	    at tsserver.js:115145:29
	    at Object.mapToDisplayParts (tsserver.js:103703:13)
	    at itemInfoForParameters (tsserver.js:115142:41)
	    at getSignatureHelpItem (tsserver.js:115108:95)
	    at tsserver.js:115081:79
	    at Array.map (<anonymous>)
	    at createSignatureHelpItems (tsserver.js:115081:36)
	    at tsserver.js:114673:23
	    at Object.runWithCancellationToken (tsserver.js:33379:28)
	    at Object.getSignatureHelpItems (tsserver.js:114671:32)
	    at Proxy.getSignatureHelpItems (tsserver.js:130744:37)
	    at IOSession.Session.getSignatureHelpItems (tsserver.js:140204:62)
	    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:139130:61)
	    at tsserver.js:140644:88
	    at IOSession.Session.executeWithRequestId (tsserver.js:140635:28)
	    at IOSession.Session.executeCommand (tsserver.js:140644:33)
	    at IOSession.Session.onMessage (tsserver.js:140667:35)
	    at Interface.<anonymous> (tsserver.js:141982:27)
	    at Interface.emit (events.js:182:13)
	    at Interface._onLine (readline.js:290:10)
	    at Interface._normalWrite (readline.js:433:12)
	    at Socket.ondata (readline.js:149:10)
	    at Socket.emit (events.js:182:13)
	    at addChunk (_stream_readable.js:283:12)
	    at readableAddChunk (_stream_readable.js:264:11)
	    at Socket.Readable.push (_stream_readable.js:219:10)
	    at Pipe.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.6.4
VSCode version: 1.39.1
Command requested: signatureHelp
Hitting sessions: 111
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:65820:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:89708:27)
    at emitNodeList (tsserver.js:89493:29)
    at emitList (tsserver.js:89390:13)
    at Object.writeList (tsserver.js:86827:13)
    at unknown (tsserver.js:110961:29)
    at Object.mapToDisplayParts (tsserver.js:100190:13)
    at itemInfoForParameters (tsserver.js:110958:41)
    at getSignatureHelpItem (tsserver.js:110924:95)
    at unknown (tsserver.js:110897:79)
    at suppressed_frame()
    at createSignatureHelpItems (tsserver.js:110897:36)
    at unknown (tsserver.js:110489:23)
    at Object.runWithCancellationToken (tsserver.js:32458:28)
    at Object.getSignatureHelpItems (tsserver.js:110487:32)
    at Proxy.getSignatureHelpItems (tsserver.js:125718:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:134825:62)
    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:133753:61)
    at unknown (tsserver.js:135265:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:135256:28)
    at IOSession.Session.executeCommand (tsserver.js:135265:33)
    at IOSession.Session.onMessage (tsserver.js:135288:35)
    at Interface.<anonymous> (tsserver.js:136603:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.2
VSCode version: 1.40.0
Command requested: signatureHelp
Hitting sessions: 392
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:68980:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:93040:27)
    at emitNodeList (tsserver.js:92825:29)
    at emitList (tsserver.js:92722:13)
    at Object.writeList (tsserver.js:90146:13)
    at unknown (tsserver.js:115282:29)
    at Object.mapToDisplayParts (tsserver.js:103836:13)
    at itemInfoForParameters (tsserver.js:115279:41)
    at getSignatureHelpItem (tsserver.js:115245:95)
    at unknown (tsserver.js:115218:79)
    at suppressed_frame()
    at createSignatureHelpItems (tsserver.js:115218:36)
    at unknown (tsserver.js:114810:23)
    at Object.runWithCancellationToken (tsserver.js:33373:28)
    at Object.getSignatureHelpItems (tsserver.js:114808:32)
    at Object.getSignatureHelpItems (tsserver.js:130887:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:140430:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139356:61)
    at unknown (tsserver.js:140870:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140861:28)
    at IOSession.Session.executeCommand (tsserver.js:140870:33)
    at IOSession.Session.onMessage (tsserver.js:140893:35)
    at Interface.<anonymous> (tsserver.js:142208:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.3
VSCode version: 1.41.0-insider
Command requested: signatureHelp
Hitting sessions: 711
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:69010:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:93079:27)
    at emitNodeList (tsserver.js:92864:29)
    at emitList (tsserver.js:92761:13)
    at Object.writeList (tsserver.js:90185:13)
    at unknown (tsserver.js:115322:29)
    at Object.mapToDisplayParts (tsserver.js:103875:13)
    at itemInfoForParameters (tsserver.js:115319:41)
    at getSignatureHelpItem (tsserver.js:115285:95)
    at unknown (tsserver.js:115258:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:115258:36)
    at unknown (tsserver.js:114917:120)
    at Object.runWithCancellationToken (tsserver.js:33392:28)
    at unknown (tsserver.js:114917:44)
    at Object.firstDefined (tsserver.js:200:26)
    at unknown (tsserver.js:114913:27)
    at Object.firstDefined (tsserver.js:200:26)
    at createJSSignatureHelpItems (tsserver.js:114912:56)
    at Object.getSignatureHelpItems (tsserver.js:114846:56)
    at Proxy.getSignatureHelpItems (tsserver.js:130927:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:140477:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139403:61)
    at unknown (tsserver.js:140917:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140908:28)
    at IOSession.Session.executeCommand (tsserver.js:140917:33)
    at IOSession.Session.onMessage (tsserver.js:140940:35)
    at Interface.<anonymous> (tsserver.js:142255:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.4
VSCode version: 1.41.1
Command requested: signatureHelp
Hitting sessions: 132
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:69015:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:93085:27)
    at emitNodeList (tsserver.js:92870:29)
    at emitList (tsserver.js:92767:13)
    at Object.writeList (tsserver.js:90191:13)
    at unknown (tsserver.js:115324:29)
    at Object.mapToDisplayParts (tsserver.js:103877:13)
    at itemInfoForParameters (tsserver.js:115321:41)
    at getSignatureHelpItem (tsserver.js:115287:95)
    at unknown (tsserver.js:115260:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:115260:36)
    at unknown (tsserver.js:114852:23)
    at Object.runWithCancellationToken (tsserver.js:33396:28)
    at Object.getSignatureHelpItems (tsserver.js:114850:32)
    at Object.getSignatureHelpItems (tsserver.js:130929:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:140492:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139418:61)
    at unknown (tsserver.js:140932:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140923:28)
    at IOSession.Session.executeCommand (tsserver.js:140932:33)
    at IOSession.Session.onMessage (tsserver.js:140955:35)
    at Interface.<anonymous> (tsserver.js:142270:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.5
VSCode version: 1.32.3
Command requested: signatureHelp
Hitting sessions: 186
Five line hash: 59b565e7ea447e9fba0c3f4dca390780
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getStartsOnNewLine (tsserver.js:69023:29)
    at shouldWriteSeparatingLineTerminator (tsserver.js:93098:27)
    at emitNodeList (tsserver.js:92883:29)
    at emitList (tsserver.js:92780:13)
    at Object.writeList (tsserver.js:90204:13)
    at unknown (tsserver.js:115352:29)
    at Object.mapToDisplayParts (tsserver.js:103905:13)
    at itemInfoForParameters (tsserver.js:115349:41)
    at getSignatureHelpItem (tsserver.js:115315:95)
    at unknown (tsserver.js:115288:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:115288:36)
    at unknown (tsserver.js:114880:23)
    at Object.runWithCancellationToken (tsserver.js:33400:28)
    at Object.getSignatureHelpItems (tsserver.js:114878:32)
    at Object.getSignatureHelpItems (tsserver.js:130957:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:140520:62)
    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (tsserver.js:139446:61)
    at unknown (tsserver.js:140960:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140951:28)
    at IOSession.Session.executeCommand (tsserver.js:140960:33)
    at IOSession.Session.onMessage (tsserver.js:140983:35)
    at Interface.<anonymous> (tsserver.js:142298:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()