dateTimeAdd() in certain scenarios gives a template validation error

[StephenWeatherford]

This is straight out of the docs (https://docs.microsoft.com/en-us/azure/azure-resource-manager/templates/template-functions-date#datetimeadd):

Template: https://raw.githubusercontent.com/StephenWeatherford/template-examples/master/1056-dateTimeAdd.json
Parameters: https://raw.githubusercontent.com/StephenWeatherford/template-examples/master/1056-dateTimeAdd.parameters.json (only needed to turn on full validation)

Error: Template validation failed: The template variable 'add3Years' is not valid: The template function 'dateTimeAdd' is not valid. Please see https://aka.ms/arm-template-expressions for usage details.. Please see https://aka.ms/arm-template-expressions for usage details.

EXPECTED: no errors
Deployment works fine:

stephenweatherford@Stephens-MacBook-Pro template-examples % ./deploy-rg.sh 1056-dateTimeAdd.json 1056-dateTimeAdd.parameters.json
{- Finished ..
"id": "/subscriptions/e5ef2b13-6478-4887-ad57-1aa6b9475040/resourceGroups/deleteme/providers/Microsoft.Resources/deployments/1056-dateTimeAdd",
"location": null,
"name": "1056-dateTimeAdd",
"properties": {
"correlationId": "1628fa0c-e2d3-45d8-a7bb-c00258655f05",
"debugSetting": null,
"dependencies": [],
"duration": "PT1.6347238S",
"mode": "Incremental",
"onErrorDeployment": null,
"outputResources": [],
"outputs": {
"add3Years": {
"type": "String",
"value": "2023-10-16T18:29:01Z"
}
},
"parameters": {
"baseTime": {
"type": "String",
"value": "2020-10-16 18:29:01Z"
}
},
"parametersLink": null,
"providers": [],
"provisioningState": "Succeeded",
"template": null,
"templateHash": "14462041680041500311",
"templateLink": null,
"timestamp": "2020-10-16T18:29:03.395443+00:00"
},
"resourceGroup": "deleteme",
"type": "Microsoft.Resources/deployments"
}

[StephenWeatherford]

Fixed in validation assembly

[jorgecotillo]

We have a fix in place in the upcoming template engine package.

[StephenWeatherford]

Fixed by validation v14