TSServer exception with strict: true

[DanielRosenwasser]

TypeScript Version: 2.6.0-dev.20171015

function wat(b) {
 b();
}

{
 "compilerOptions": {
 "strict": true
 }
}

'getCodeFixes' request failed with error.
Error processing request. Cannot read property 'kind' of undefined
TypeError: Cannot read property 'kind' of undefined
 at isFunctionExpressionOrArrowFunction (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:30997:24)
 at getContextualSignatureForFunctionLikeDeclaration (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:31000:20)
 at getReturnTypeFromBody (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:33412:39)
 at getReturnTypeOfSignature (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:25461:28)
 at buildReturnTypeDisplay (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:23140:34)
 at buildSignatureDisplay (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:23171:17)
 at writeLiteralType (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:22899:29)
 at writeAnonymousType (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:22834:25)
 at writeType (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:22686:25)
 at Object.buildTypeDisplay (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:22649:24)
 at typeToString (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:76419:51)
 at C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:76310:42
 at Object.zipWith (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:1339:25)
 at getCodeActionForParameters (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:76308:38)
 at Object.getActionsForAddExplicitTypeAnnotation [as getCodeActions] (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:76265:28)
 at C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:74743:33
 at Object.forEach (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:1312:30)
 at Object.getFixes (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:74742:16)
 at C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:79739:35
 at Object.flatMap (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:1530:25)
 at Object.getCodeFixesAtPosition (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:79737:23)
 at IOSession.Session.getCodeFixes (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:86044:64)
 at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:84976:61)
 at C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:86189:88
 at IOSession.Session.executeWithRequestId (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:86180:28)
 at IOSession.Session.executeCommand (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:86189:33)
 at IOSession.Session.onMessage (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:86209:35)
 at Interface.<anonymous> (C:\Users\drosen\AppData\Local\nvs\node\8.6.0\x64\node_modules\typescript\lib\tsserver.js:87344:27)
 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)

[mhegazy]

fix up in #19264