Components: AOT: Property 'panelOpenState' does not exist on type 'ExpansionPanelComponent'

[momoadeli]

Bug, feature request, or proposal:

"ng build --env dev --aot" gives error:
Property 'panelOpenState' does not exist on type 'ExpansionPanelComponent'

What is the expected behavior?

Build success

What is the current behavior?

Property 'panelOpenState' does not exist on type 'ExpansionPanelComponent'

What are the steps to reproduce?

Providing a StackBlitz reproduction is the best way to share your issue.

StackBlitz starter: https://goo.gl/wwnhMV

What is the use-case or motivation for changing an existing behavior?

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Current package.json:
"dependencies": {
"@angular/animations": "^5.1.3",
"@angular/cdk": "^5.1.1",
"@angular/common": "^5.1.2",
"@angular/compiler": "^5.1.2",
"@angular/core": "^5.1.2",
"@angular/forms": "^5.1.2",
"@angular/http": "^5.1.2",
"@angular/material": "^5.1.1",
"@angular/platform-browser": "^5.1.2",
"@angular/platform-browser-dynamic": "^5.1.2",
"@angular/router": "^5.1.2",
"@auth0/angular-jwt": "^1.0.0-beta.9",
"@ngrx/effects": "^4.1.1",
"@ngrx/entity": "^4.1.1",
"@ngrx/router-store": "^4.1.1",
"@ngrx/store": "^4.1.1",
"bootstrap": "4.0.0-alpha.6",
"core-js": "^2.5.3",
"font-awesome": "^4.7.0",
"lodash": "^4.17.4",
"rxjs": "^5.5.6",
"zone.js": "^0.8.19"
},
"devDependencies": {
"@angular/cli": "^1.6.7",
"@angular/compiler-cli": "^5.1.2",
"@angular/language-service": "^5.1.2",
"@compodoc/compodoc": "^1.0.5",
"@ngrx/store-devtools": "^4.1.1",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/node": "^6.0.95",
"angular-in-memory-web-api": "^0.5.2",
"codelyzer": "~3.2.0",
"commitizen": "^2.9.6",
"cz-conventional-changelog": "^2.1.0",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.3.3",
"karma-jasmine": "^1.1.1",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "~2.4.2"
},

Is there anything else we should know?

• I've clean uninstalled an re-installed cli, material, and cdk.

[crisbeto]

It seems like the only mention of that property is in one of our examples. Are you sure that it's not something that is missing in your code?

[momoadeli]

Yep, that was it... @crisbeto many thanks. This issue can be closed.

[AlbertoBonfiglio]

@momoadeli Care to share what it was? I am having the same issue...

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