ERROR in TypeError: Cannot read property 'flags' of undefined

🐞 bug report

Affected Package

Unknown，Just upgrade form 9.1.4 to 9.1.5.

Is this a regression?

Yes, the previous version in which this bug was not present was: ....

Description

ERROR in TypeError: Cannot read property 'flags' of undefined

🔬 Minimal Reproduction

🔥 Exception or Error


Compiling primeng/toast : es2015 as esm2015
Compiling primeng/togglebutton : es2015 as esm2015
Compiling primeng/toolbar : es2015 as esm2015
Compiling primeng/tree : es2015 as esm2015
Compiling primeng/tristatecheckbox : es2015 as esm2015

chunk {main} main.js, main.js.map (main) 1.97 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 661 bytes [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.15 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 1.51 MB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 339 kB [initial] [rendered]
Date: 2020-05-08T02:31:39.787Z - Hash: ce73c7a432145f234c81 - Time: 10711ms

ERROR in TypeError: Cannot read property 'flags' of undefined
    at resolveAlias (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:36513:37)
    at checkAliasSymbol (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:64502:26)
    at checkImportBinding (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:64534:13)
    at checkImportDeclaration (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:64552:29)
    at checkSourceElementWorker (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:64961:28)
    at checkSourceElement (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:64800:17)
    at Object.forEach (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:317:30)
    at checkSourceFileWorker (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:65123:20)
    at checkSourceFile (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:65091:13)
    at getDiagnosticsWorker (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:65179:17)
    at Object.getDiagnostics (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:65165:24)
    at F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:98703:85
    at runWithCancellationToken (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:98665:24)
    at getBindAndCheckDiagnosticsForFileNoCache (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:98691:20)
    at getAndCacheDiagnostics (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:98956:26)
    at getBindAndCheckDiagnosticsForFile (F:\sodic2020\UI\node_modules\typescript\lib\typescript.js:98688:20)

** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **

🌍 Your Environment

Angular Version:


Angular CLI: 9.1.4
Node: 12.16.1
OS: win32 x64

Angular: 9.1.5
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.901.4
@angular-devkit/build-angular     0.901.4
@angular-devkit/build-optimizer   0.901.4
@angular-devkit/build-webpack     0.901.4
@angular-devkit/core              9.1.4
@angular-devkit/schematics        9.1.4
@angular/cli                      9.1.4
@ngtools/webpack                  9.1.4
@schematics/angular               9.1.4
@schematics/update                0.901.4
rxjs                              6.5.5
typescript                        3.8.3
webpack                           4.42.0

Anything else relevant?

Run:
npm install @angular/core@9.1.4 @angular/animations@9.1.4 @angular/common@9.1.4 @angular/forms@9.1.4 @angular/platform-browser@9.1.4 @angular/router@9.1.4 @angular/platform-browser-dynamic@9.1.4 @angular/compiler@9.1.4 @angular/compiler-cli@9.1.4 @angular/language-service@9.1.4

ng build

From: https://stackoverflow.com/a/61671596/5157008

Run:
npm install @angular/core@9.1.4 @angular/animations@9.1.4 @angular/common@9.1.4 @angular/forms@9.1.4 @angular/platform-browser@9.1.4 @angular/router@9.1.4 @angular/platform-browser-dynamic@9.1.4 @angular/compiler@9.1.4 @angular/compiler-cli@9.1.4 @angular/language-service@9.1.4

ng build

From: https://stackoverflow.com/a/61671596/5157008

just rollback，wait for fix

Possible duplicate of #36992

I have same issue.
ERROR in TypeError: Cannot read property 'flags' of undefined at resolveAlias (E:\Angular\node_modules\typescript\lib\typescript.js:36513:37) at checkAliasSymbol (E:\Angular\node_modules\typescript\lib\typescript.js:64502:26) at checkImportBinding (E:\Angular\node_modules\typescript\lib\typescript.js:64534:13) at checkImportDeclaration (E:\Angular\node_modules\typescript\lib\typescript.js:64552:29) at checkSourceElementWorker (E:\Angular\node_modules\typescript\lib\typescript.js:64961:28) at checkSourceElement (E:\Angular\node_modules\typescript\lib\typescript.js:64800:17) at Object.forEach (E:\Angular\node_modules\typescript\lib\typescript.js:317:30) at checkSourceFileWorker (E:\Angular\node_modules\typescript\lib\typescript.js:65123:20) at checkSourceFile (E:\Angular\node_modules\typescript\lib\typescript.js:65091:13) at getDiagnosticsWorker (E:\Angular\node_modules\typescript\lib\typescript.js:65179:17) at Object.getDiagnostics (E:\Angular\node_modules\typescript\lib\typescript.js:65165:24) at E:\Angular\node_modules\typescript\lib\typescript.js:98703:85 at runWithCancellationToken (E:\Angular\node_modules\typescript\lib\typescript.js:98665:24) at getBindAndCheckDiagnosticsForFileNoCache (E:\Angular\node_modules\typescript\lib\typescript.js:98691:20) at getAndCacheDiagnostics (E:\Angular\node_modules\typescript\lib\typescript.js:98956:26) at getBindAndCheckDiagnosticsForFile (E:\Angular\node_modules\typescript\lib\typescript.js:98688:20)

How can i rollback to 9.1.4 ?

How can i rollback to 9.1.4 ?

https://stackoverflow.com/questions/61670882/error-in-typeerror-cannot-read-property-flags-of-undefined/61671596#61671596

Same issue, updating 9.1.4 to 9.1.5. Weird thing is that only happens on Win10, on macOS 10.15.4 works fine.

I has same issue with 9.1.4 , So believe no point rolling back.

Same here, I am having this error too. after updating from angular 9.1.4 to 9.1.5

"@angular/animations": "^9.1.5", "@angular/common": "^9.1.5", "@angular/compiler": "^9.1.5", "@angular/core": "^9.1.5", "@angular/forms": "^9.1.5", "@angular/platform-browser": "^9.1.5", "@angular/platform-browser-dynamic": "^9.1.5", "@angular/router": "^9.1.5",

how to fix this issue?

I have the same error when updating from 9.1.4 to 9.1.5.

ERROR in TypeError: Cannot read property 'flags' of undefined
    at resolveAlias (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:36513:37)
    at checkAliasSymbol (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:64502:26)
    at checkImportBinding (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:64534:13)
    at checkImportDeclaration (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:64552:29)
    at checkSourceElementWorker (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:64961:28)
    at checkSourceElement (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:64800:17)
    at Object.forEach (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:317:30)
    at checkSourceFileWorker (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:65123:20)
    at checkSourceFile (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:65091:13)
    at getDiagnosticsWorker (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:65179:17)
    at Object.getDiagnostics (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:65165:24)
    at c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:98703:85
    at runWithCancellationToken (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:98665:24)
    at getBindAndCheckDiagnosticsForFileNoCache (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:98691:20)
    at getAndCacheDiagnostics (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:98956:26)
    at getBindAndCheckDiagnosticsForFile (c:\Projects\Mithra\mithra-web\node_modules\typescript\lib\typescript.js:98688:20)

I had to revert to 9.1.4 to solve the issue

Revert "fix(compiler-cli): `isCaseSensitive()` returns correct value (#…

Revert "fix(compiler-cli): ensure `getRootDirs()` handles case-sensit…

Revert "fix(compiler-cli): ensure LogicalFileSystem handles case-sens…

Revert "fix(compiler-cli): fix case-sensitivity issues in NgtscCompil…

We have just released 9.1.6 which should not have this problem. Please test.

Upgrading to 9.1.6 has now solved the issue
Thanks

@petebacondarwin

As @petebacondarwin mentioned, upgrading to 9.1.6 should fix the problem. Closing the issue now. In case the problem is still not resolved, feel free to open a new one.

Angular 9.1.6 solved the problems, Thank you

fix(compiler-cli): ensure LogicalFileSystem maintains case in paths (#…

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ERROR in TypeError: Cannot read property 'flags' of undefined #36993

🐞 bug report

Affected Package

Is this a regression?

Description

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🔥 Exception or Error

🌍 Your Environment

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PL/B Language Development and Support

ERROR in TypeError: Cannot read property 'flags' of undefined #36993

Description

🐞 bug report

Affected Package

Is this a regression?

Description

🔬 Minimal Reproduction

🔥 Exception or Error

🌍 Your Environment

Activity

guillermohernandez commented on May 8, 2020

magicdict commented on May 8, 2020

petebacondarwin commented on May 8, 2020

yangjunfocus commented on May 8, 2020

PierreMigne commented on May 8, 2020

destus90 commented on May 8, 2020

igorosabel commented on May 8, 2020

SourabhJha commented on May 8, 2020

JoshuvaGeorge03 commented on May 8, 2020

FabienDehopre commented on May 8, 2020

17 remaining items

petebacondarwin commented on May 8, 2020

sahad78 commented on May 8, 2020

mgechev commented on May 8, 2020

SourabhJha commented on May 9, 2020

angular-automatic-lock-bot commented on Jun 9, 2020

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