TypeError: Cannot read property 'emitNode' of undefined in 'Object.getCommentRange' 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: 1009
Five line hash: c88434bf663f341ed54e24c8c38e617e
Stack:

    at getCommentRange (tsserver.js:64119:29)
    at emitNodeList (tsserver.js:87249:51)
    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: 1.37.1
Command requested: signatureHelp
Hitting sessions: 679
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:65754:29)
    at emitNodeList (tsserver.js:89423:51)
    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: 1426
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:65828:29)
    at emitNodeList (tsserver.js:89502:51)
    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 Proxy.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()

[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: 164
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:65837:29)
    at emitNodeList (tsserver.js:89511:51)
    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 Object.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: 1656
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:68997:29)
    at emitNodeList (tsserver.js:92843:51)
    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 Proxy.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: 2189
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:69025:29)
    at emitNodeList (tsserver.js:92876:51)
    at emitList (tsserver.js:92755:13)
    at Object.writeList (tsserver.js:90179:13)
    at unknown (tsserver.js:115316:29)
    at Object.mapToDisplayParts (tsserver.js:103869:13)
    at itemInfoForParameters (tsserver.js:115313:41)
    at getSignatureHelpItem (tsserver.js:115279:95)
    at unknown (tsserver.js:115252:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:115252:36)
    at unknown (tsserver.js:114844:23)
    at Object.runWithCancellationToken (tsserver.js:33390:28)
    at Object.getSignatureHelpItems (tsserver.js:114842:32)
    at Proxy.getSignatureHelpItems (tsserver.js:130921:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:140471:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139397:61)
    at unknown (tsserver.js:140911:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140902:28)
    at IOSession.Session.executeCommand (tsserver.js:140911:33)
    at IOSession.Session.onMessage (tsserver.js:140934:35)
    at Interface.<anonymous> (tsserver.js:142249:27)
    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: 555
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:69032:29)
    at emitNodeList (tsserver.js:92888:51)
    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:114919:120)
    at Object.runWithCancellationToken (tsserver.js:33396:28)
    at unknown (tsserver.js:114919:44)
    at Object.firstDefined (tsserver.js:200:26)
    at unknown (tsserver.js:114915:27)
    at Object.firstDefined (tsserver.js:200:26)
    at createJSSignatureHelpItems (tsserver.js:114914:56)
    at Object.getSignatureHelpItems (tsserver.js:114848:56)
    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: 1.42.0-insider
Command requested: signatureHelp
Hitting sessions: 614
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:69040:29)
    at emitNodeList (tsserver.js:92901:51)
    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.<computed> (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()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.8.2
VSCode version: 1.42.1
Command requested: signatureHelp
Hitting sessions: 292
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:71053:29)
    at emitNodeList (tsserver.js:95627:51)
    at emitList (tsserver.js:95506:13)
    at Object.writeList (tsserver.js:92842:13)
    at unknown (tsserver.js:119265:29)
    at Object.mapToDisplayParts (tsserver.js:107152:13)
    at itemInfoForParameters (tsserver.js:119262:41)
    at getSignatureHelpItem (tsserver.js:119228:95)
    at unknown (tsserver.js:119201:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:119201:36)
    at unknown (tsserver.js:118793:23)
    at Object.runWithCancellationToken (tsserver.js:34515:28)
    at Object.getSignatureHelpItems (tsserver.js:118791:32)
    at Proxy.getSignatureHelpItems (tsserver.js:135459:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:145464:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:144358:61)
    at unknown (tsserver.js:145957:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:145948:28)
    at IOSession.Session.executeCommand (tsserver.js:145957:33)
    at IOSession.Session.onMessage (tsserver.js:145981:35)
    at Interface.<anonymous> (tsserver.js:147296:27)
    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: 3.8.3
VSCode version: 1.42.1
Command requested: signatureHelp
Hitting sessions: 180
Five line hash: 5b7b860f1dbf45415208daf3e3a22530
Stack:

TypeError: Cannot read property 'emitNode' of undefined
    at Object.getCommentRange (tsserver.js:71102:29)
    at emitNodeList (tsserver.js:95676:51)
    at emitList (tsserver.js:95555:13)
    at Object.writeList (tsserver.js:92891:13)
    at unknown (tsserver.js:119315:29)
    at Object.mapToDisplayParts (tsserver.js:107201:13)
    at itemInfoForParameters (tsserver.js:119312:41)
    at getSignatureHelpItem (tsserver.js:119278:95)
    at unknown (tsserver.js:119251:79)
    at Array.map (<anonymous>)
    at createSignatureHelpItems (tsserver.js:119251:36)
    at unknown (tsserver.js:118843:23)
    at Object.runWithCancellationToken (tsserver.js:34552:28)
    at Object.getSignatureHelpItems (tsserver.js:118841:32)
    at Proxy.getSignatureHelpItems (tsserver.js:135509:37)
    at IOSession.Session.getSignatureHelpItems (tsserver.js:145510:62)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:144404:61)
    at unknown (tsserver.js:146003:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:145994:28)
    at IOSession.Session.executeCommand (tsserver.js:146003:33)
    at IOSession.Session.onMessage (tsserver.js:146027:35)
    at Interface.<anonymous> (tsserver.js:147342:27)
    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()

[amcasey]

Telemetry shows this as a top server error for 3.9 builds - thousands of hits a day in VS Code. FYI @DanielRosenwasser