Unable to create library

[guysenpai]

Versions

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Angular CLI: 6.0.3
Node: 9.11.1
OS: darwin x64
Angular: 6.0.3
... animations, cli, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router, service-worker

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.6.3
@angular-devkit/build-angular     0.6.3
@angular-devkit/build-optimizer   0.6.3
@angular-devkit/core              0.6.3
@angular-devkit/schematics        0.6.3
@angular/cdk                      6.1.0
@angular/flex-layout              6.0.0-beta.15
@angular/material                 6.1.0
@angular/pwa                      0.6.3
@ngtools/webpack                  6.0.3
@schematics/angular               0.6.3
@schematics/update                0.6.3
rxjs                              6.2.0
typescript                        2.7.2
webpack                           4.8.3

Repro steps

• Step 1
• Step 2
• Step 3

Observed behavior

 ng generate library modulo-theme --prefix mod
Unexpected token } in JSON at position 581
error Command failed with exit code 1.

Desired behavior

I want to generate a library

Mention any other details that might be useful (optional)

[hamoom]

having a similar issue

ng generate library my-header
Unexpected token ] in JSON at position 863

[hamoom]

I had this trailing comma in my styles in my angular.json file. it was causing the error.

            "styles": [
              "src/styles.css",
            ],

[hansl]

We have a fix for this. In the meantime this is a dupe of #10757. Short answer; it's a bug and trailing commas should be allowed in angular.json (it's a JSON 5 file).

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