While using ng-packagr to generate angular package, it throws `Object.getJSDocTags` error

Type of Issue

[x] Bug Report

Description

_A bug: _

while using ng-packgr to generate angular package it throws following error.

`> @syncfusion/ej2-angular-buttons@17.1.1 packagr D:\workspace\components\ej2-button-components\third-party\angular

ng-packagr -p ng-package.json && gulp tslib-resolve && gulp npmrc-changelog-injection

Building Angular library Generating bundle for @syncfusion/ej2-angular-buttons Cleaning bundle build directory Processing assets Running ngc Compiling to FESM15 Compiling to FESM5

BUILD ERROR Debug Failure. False expression. Error: Debug Failure. False expression. at Object.getJSDocTags (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:13197:22) at getJSDocTypeParameterDeclarations (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:11650:30) at Object.getEffectiveTypeParameterDeclarations (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:11645:67) at checkClassLikeDeclaration (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:48734:36) at checkClassExpression (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:48710:13) at checkExpressionWorker (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:45678:28) at checkExpression (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:45609:42) at checkBinaryLikeExpression (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:45155:29) at checkBinaryExpression (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:45147:20) at checkExpressionWorker (D:\workspace\components\ej2-button-components\third-party\angular\node_modules\typescript\lib\typescript.js:45702:28)

npm ERR! code ELIFECYCLE npm ERR! errno 111 npm ERR! @syncfusion/ej2-angular-buttons@17.1.1 packagr: ng-packagr -p ng-package.json && gulp tslib-resolve && gulp npmrc-changelog-injection npm ERR! Exit status 111 npm ERR! npm ERR! Failed at the @syncfusion/ej2-angular-buttons@17.1.1 packagr script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\kumaresan.subramani\AppData\Roaming\npm-cache_logs\2019-02-04T04_19_15_625Z-debug.log`

Expected Behaviour

if i use typescript version 2.8.4 or 2.7.2, issue wont be reproduced. i don’t know why. so please explain this to me?

working fine

"ng-packagr": "1.5.0", "tsickle": "0.34.0", "typescript": "^2.8.4", "uglify-js": "3.2.2"

Version Information

$ node_modules/.bin/ng-packagr --version
ng-packagr: 1.5.0
@angular/*: 4.10.0
typescript: 2.9.2
rxjs: x.y.z
node: 8.11.3
npm/yarn: 6.6.0

Please include all version numbers that might be relevant, e.g. third-party libraries

[alan-agius4]

The solution would be to downgrade or upgrade typescript.

Upgrade is the suggested path of course.

[github-actions[bot]]

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