Cannot read property 'getTypeChecker' of undefined at watchFailedLookupLocationOfNonRelativeModuleResolutions

[cevek]

TypeScript Version: 3.0.0-dev.20180712

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Code

TypeError: Cannot read property 'getTypeChecker' of undefined
    at watchFailedLookupLocationOfNonRelativeModuleResolutions (/usr/local/lib/node_modules/typescript/lib/tsserver.js:85583:70)
    at Map.forEach (native)
    at Object.clearPerDirectoryResolutions [as startCachingPerDirectoryResolution] (/usr/local/lib/node_modules/typescript/lib/tsserver.js:85338:50)
    at ConfiguredProject.Project.updateGraphWorker (/usr/local/lib/node_modules/typescript/lib/tsserver.js:115350:38)
    at ConfiguredProject.Project.updateGraph (/usr/local/lib/node_modules/typescript/lib/tsserver.js:115299:42)
    at ConfiguredProject.updateGraph (/usr/local/lib/node_modules/typescript/lib/tsserver.js:115669:61)
    at ConfiguredProject.Project.getLanguageService (/usr/local/lib/node_modules/typescript/lib/tsserver.js:115005:26)
    at IOSession.Session.getApplicableRefactors (/usr/local/lib/node_modules/typescript/lib/tsserver.js:119171:32)
    at Session.handlers.ts.createMapFromTemplate._a.(anonymous function) (/usr/local/lib/node_modules/typescript/lib/tsserver.js:118117:61)
    at /usr/local/lib/node_modules/typescript/lib/tsserver.js:119389:88
    at IOSession.Session.executeWithRequestId (/usr/local/lib/node_modules/typescript/lib/tsserver.js:119380:28)
    at IOSession.Session.executeCommand (/usr/local/lib/node_modules/typescript/lib/tsserver.js:119389:33)
    at IOSession.Session.onMessage (/usr/local/lib/node_modules/typescript/lib/tsserver.js:119409:35)
    at Interface.<anonymous> (/usr/local/lib/node_modules/typescript/lib/tsserver.js:120676:27)

Expected behavior:

Actual behavior:

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